Raise min iOS version for the build-all app

Author: stuartmorgan-g

script/configs/exclude_all_packages_app.yaml

@@ -20,6 +20,7 @@
 # time (if they did, it would be impossible to select the SDK-specific
 # version).
 - google_maps_flutter_ios
-# We can't test both SDK 9 and SDK 10, so arbitrarly use the latest as
-# the test of overriding the endorsement.
-- google_maps_flutter_ios_sdk9
+# We can't test both SDK 9 and SDK 10; use 9 (excluding everything but 9)
+# so that the min iOS version of the build-all app doesn't need to be
+# raised any higher than necessary.
+- google_maps_flutter_ios_sdk10

script/tool/lib/src/create_all_packages_app_command.dart

@@ -457,9 +457,9 @@ dev_dependencies:${_pubspecMapString(pubspec.devDependencies)}
     _adjustFile(
       pbxprojFile,
       replacements: <String, List<String>>{
-        // iOS 14 is required by google_maps_flutter.
+        // iOS 15 is required by google_maps_flutter_ios_sdk9.
         'IPHONEOS_DEPLOYMENT_TARGET': <String>[
-          '				IPHONEOS_DEPLOYMENT_TARGET = 14.0;',
+          '				IPHONEOS_DEPLOYMENT_TARGET = 15.0;',
         ],
       },
     );