Update actions/cache action to v4

Author: renovate[bot]

.github/workflows/android.yml

@@ -48,7 +48,7 @@ jobs:
           java-version: 17
 
       - name: Cache Gradle and wrapper
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             ~/.gradle/caches