[Android][webview_flutter] Run integration tests on emulators running Android 34 (flutter#6499)

Changes webview_flutter , webview_flutter_android tests to run on emulators running SDK 34 for Android. I also

1. Changed all `unawaited` calls in non-legacy tests to `await`. I believe several of the setup steps need to be completed before running checks based on testing, so this should leave the tests safer overall.
2. Changing the integration test directory structures look like what is described in [the integration_test packages instructions](https://github.com/flutter/flutter/blob/master/packages/integration_test/README.md#package-structure). Without changing the package to this structure, CI seemed to run the tests in parallel. I am still trying to figure out why this is but no longer want to block this PR.

Also removes shards for testing packages against Android 33 since no packages are running on emulators running Android 33 anymore.

Fixes flutter#140001. Fixes flutter#137083.

Author: camsim99

.ci.yaml

@@ -394,17 +394,13 @@ targets:
           "CHANNEL": "stable"
         }
 
-  # All of the Linux_android android_platform_tests shards have the same
-  # dependency list, despite some running on Android 33 AVDs versus 34.
-  # See https://github.com/flutter/flutter/issues/137082 for context.
   - name: Linux_android android_platform_tests_shard_1 master
     recipe: packages/packages
     timeout: 60
     properties:
       target_file: android_platform_tests.yaml
       channel: master
       version_file: flutter_master.version
-      # set up for 34
       package_sharding: "--shardIndex 0 --shardCount 6"
       dependencies: >-
         [
@@ -423,7 +419,6 @@ targets:
       target_file: android_platform_tests.yaml
       channel: master
       version_file: flutter_master.version
-      # set up for 34
       package_sharding: "--shardIndex 1 --shardCount 6"
       dependencies: >-
         [
@@ -442,7 +437,6 @@ targets:
       target_file: android_platform_tests.yaml
       channel: master
       version_file: flutter_master.version
-      # set up for 34
       package_sharding: "--shardIndex 2 --shardCount 6"
       dependencies: >-
         [
@@ -461,7 +455,6 @@ targets:
       target_file: android_platform_tests.yaml
       channel: master
       version_file: flutter_master.version
-      # set up for 34
       package_sharding: "--shardIndex 3 --shardCount 6"
       dependencies: >-
         [
@@ -480,7 +473,6 @@ targets:
       target_file: android_platform_tests.yaml
       channel: master
       version_file: flutter_master.version
-      # set up for 34
       package_sharding: "--shardIndex 4 --shardCount 6"
       dependencies: >-
         [
@@ -499,7 +491,6 @@ targets:
       target_file: android_platform_tests.yaml
       channel: master
       version_file: flutter_master.version
-      # set up for 34
       package_sharding: "--shardIndex 5 --shardCount 6"
       dependencies: >-
         [
@@ -511,44 +502,6 @@ targets:
           "PACKAGE_SHARDING": "--shardIndex 5 --shardCount 6"
         }
 
-  - name: Linux_android android_platform_tests_api_33_shard_1 master
-    recipe: packages/packages
-    timeout: 60
-    properties:
-      target_file: android_platform_tests_api_33_avd.yaml
-      channel: master
-      version_file: flutter_master.version
-      # set up for 33
-      package_sharding: "--shardIndex 0 --shardCount 2"
-      dependencies: >-
-        [
-          {"dependency": "android_virtual_device", "version": "android_33_google_apis_x64.textpb"}
-        ]
-      env_variables: >-
-        {
-          "CHANNEL": "master",
-          "PACKAGE_SHARDING": "--shardIndex 0 --shardCount 2"
-        }
-
-  - name: Linux_android android_platform_tests_api_33_shard_2 master
-    recipe: packages/packages
-    timeout: 60
-    properties:
-      target_file: android_platform_tests_api_33_avd.yaml
-      channel: master
-      version_file: flutter_master.version
-      # set up for 33
-      package_sharding: "--shardIndex 1 --shardCount 2"
-      dependencies: >-
-        [
-          {"dependency": "android_virtual_device", "version": "android_33_google_apis_x64.textpb"}
-        ]
-      env_variables: >-
-        {
-          "CHANNEL": "master",
-          "PACKAGE_SHARDING": "--shardIndex 1 --shardCount 2"
-        }
-
   - name: Linux_android android_platform_tests_shard_1 stable
     recipe: packages/packages
     presubmit: false
@@ -663,42 +616,6 @@ targets:
           "PACKAGE_SHARDING": "--shardIndex 5 --shardCount 6"
         }
 
-  - name: Linux_android android_platform_tests_api_33_shard_1 stable
-    recipe: packages/packages
-    timeout: 60
-    properties:
-      target_file: android_platform_tests_api_33_avd.yaml
-      channel: stable
-      version_file: flutter_stable.version
-      package_sharding: "--shardIndex 0 --shardCount 2"
-      dependencies: >-
-        [
-          {"dependency": "android_virtual_device", "version": "android_33_google_apis_x64.textpb"}
-        ]
-      env_variables: >-
-        {
-          "CHANNEL": "stable",
-          "PACKAGE_SHARDING": "--shardIndex 0 --shardCount 2"
-        }
-
-  - name: Linux_android android_platform_tests_api_33_shard_2 stable
-    recipe: packages/packages
-    timeout: 60
-    properties:
-      target_file: android_platform_tests_api_33_avd.yaml
-      channel: stable
-      version_file: flutter_stable.version
-      package_sharding: "--shardIndex 1 --shardCount 2"
-      dependencies: >-
-        [
-          {"dependency": "android_virtual_device", "version": "android_33_google_apis_x64.textpb"}
-        ]
-      env_variables: >-
-        {
-          "CHANNEL": "stable",
-          "PACKAGE_SHARDING": "--shardIndex 1 --shardCount 2"
-        }
-
   - name: Linux_android_legacy android_platform_tests_legacy_api_shard_1 master
     recipe: packages/packages
     timeout: 60

.ci/targets/android_platform_tests.yaml

@@ -5,23 +5,23 @@ tasks:
   - name: download Dart and Android deps
     script: .ci/scripts/tool_runner.sh
     infra_step: true
-    args: ["fetch-deps", "--android", "--supporting-target-platforms-only", "--exclude=script/configs/still_requires_api_33_avd.yaml"]
+    args: ["fetch-deps", "--android", "--supporting-target-platforms-only"]
   - name: build examples
     script: .ci/scripts/tool_runner.sh
-    args: ["build-examples", "--apk", "--exclude=script/configs/still_requires_api_33_avd.yaml"]
+    args: ["build-examples", "--apk"]
   - name: lint
     script: .ci/scripts/tool_runner.sh
-    args: ["lint-android", "--exclude=script/configs/still_requires_api_33_avd.yaml"]
+    args: ["lint-android"]
   # Native unit and native integration are split into two steps to allow for
   # different exclusions.
   # TODO(stuartmorgan): Eliminate the native unit test exclusion, and combine
   # these steps.
   - name: native unit tests
     script: .ci/scripts/tool_runner.sh
-    args: ["native-test", "--android", "--no-integration", "--exclude=script/configs/exclude_native_unit_android.yaml,script/configs/still_requires_api_33_avd.yaml"]
+    args: ["native-test", "--android", "--no-integration", "--exclude=script/configs/exclude_native_unit_android.yaml"]
   - name: native integration tests
     script: .ci/scripts/tool_runner.sh
-    args: ["native-test", "--android", "--no-unit", "--exclude=script/configs/still_requires_api_33_avd.yaml"]
+    args: ["native-test", "--android", "--no-unit"]
   - name: drive examples
     script: .ci/scripts/tool_runner.sh
-    args: ["drive-examples", "--android", "--exclude=script/configs/exclude_integration_android.yaml,script/configs/exclude_integration_android_emulator.yaml,script/configs/still_requires_api_33_avd.yaml"]
+    args: ["drive-examples", "--android", "--exclude=script/configs/exclude_integration_android.yaml,script/configs/exclude_integration_android_emulator.yaml"]