ci: add Kotlin example project compilation to CI pipeline (#217)

Author: chipp

.github/workflows/ci.yml

@@ -270,8 +270,7 @@ jobs:
       - name: Free disk space
         run: |
           df -h
-          sudo rm -rf /usr/local/lib/android \
-                      /opt/hostedtoolcache/CodeQL \
+          sudo rm -rf /opt/hostedtoolcache/CodeQL \
                       /usr/share/dotnet \
                       /opt/ghc || true
           sudo apt-get clean
@@ -289,21 +288,26 @@ jobs:
         with:
           toolchain: ${{ steps.rust-version.outputs.toolchain }}
 
-      - name: Cache Cargo dependencies
-        uses: actions/cache@v4
+      - name: Setup Java
+        uses: actions/setup-java@v4
         with:
-          path: |
-            ~/.cargo/bin/
-            ~/.cargo/registry/index/
-            ~/.cargo/registry/cache/
-            ~/.cargo/git/db/
-            target/
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-cargo-
+          distribution: temurin
+          java-version: "17"
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
 
       - name: Install cross (for Android targets, if not cached)
         run: command -v cross || cargo install cross --git https://github.com/cross-rs/cross --locked
 
       - name: Build Kotlin bindings (host + Android ABIs)
         run: ./scripts/build-kotlin.sh
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v4
+        with:
+          packages: tools platform-tools platforms;android-35 build-tools;35.0.0
+
+      - name: Build Kotlin sample app
+        working-directory: kotlin/Examples/IDKitSampleApp
+        run: ./gradlew :app:assembleDebug

kotlin/Examples/IDKitSampleApp/app/src/main/java/com/worldcoin/idkit/sample/MainActivity.kt

@@ -352,6 +352,7 @@ private class SampleModel {
                         SampleEnvironment.PRODUCTION -> Environment.PRODUCTION
                         SampleEnvironment.STAGING -> Environment.STAGING
                     },
+                    connectUrlMode = null
                 )
                 val preset = legacyPreset.toPreset(signal)