Add remote Gradle build cache support

bitrise.yml

@@ -419,6 +419,10 @@ workflows:
       - git-clone@8: { }
       - cache-pull@2: { }
       - restore-gradle-cache@1: { }
+      - activate-build-cache-for-gradle:
+          inputs:
+            - push: 'true'
+            - validation_level: warning
       - script-runner@0:
           # Maven doesn't like java 17, so running it before.
           run_if: '{{getenv "NEEDS_ROBOLECTRIC" | ne ""}}'