ci: enable gradle build cache (#212)

Enables Gradle build cache to improve CI performance.
- Replaces `cache: gradle` in `actions/setup-java` with `gradle/actions/setup-gradle@v4` in `.github/workflows/android.yml`.
- Enables build cache in `gradle.properties` by setting `org.gradle.caching=true`.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: Asutorufa

.github/workflows/android.yml

@@ -39,7 +39,9 @@ jobs:
         with:
           java-version: "17"
           distribution: "temurin"
-          cache: gradle
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
 
       - name: Build with Gradle
         env:

gradle.properties

@@ -15,3 +15,4 @@ org.gradle.jvmargs=-Xmx1024M -Dkotlin.daemon.jvm.options\="-Xmx1024M"
 android.useAndroidX=true
 #android.nonTransitiveRClass=true
 robolectric.dependency.repo.url=https://repo1.maven.org/maven2/
+org.gradle.caching=true