Migrate to Node 20 on CI via GitHub Actions major upgrades (#372)

* Update first party actions to Node 20 majors.

* Update Gradle cache actions to Node 20 majors.

.github/workflows/main.yml

@@ -49,7 +49,7 @@ jobs:
 
     steps:
     - name: checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: validate gradle wrapper
       uses: gradle/wrapper-validation-action@v1
@@ -61,12 +61,12 @@ jobs:
         npm run lint
         npm test
 
-    - uses: actions/setup-java@v3
+    - uses: actions/setup-java@v4
       with:
         distribution: 'zulu'
         java-version: 21
 
-    - uses: actions/cache@v3
+    - uses: actions/cache@v4
       id: avd-cache
       with:
         path: |
@@ -75,11 +75,11 @@ jobs:
           ~/.android/debug.keystore
         key: avd-${{ matrix.api-level }}-${{ matrix.os }}-${{ matrix.target }}
 
+    - uses: gradle/actions/setup-gradle@v3
+
     - name: assemble tests
-      uses: gradle/gradle-build-action@v2
-      with:
-        build-root-directory: test-fixture
-        arguments: assembleAndroidTest
+      working-directory: test-fixture
+      run: ./gradlew assembleAndroidTest
 
     - name: enable KVM for linux runners
       if: runner.os == 'Linux'