Enable gradle caching on the Github CI system.

.github/workflows/android.yml

@@ -24,6 +24,7 @@ jobs:
       with:
         distribution: temurin
         java-version: 11
+        cache: gradle
 
     - name: Validate Gradle Wrapper
       uses: gradle/wrapper-validation-action@v1

app/src/main/java/org/thoughtcrime/securesms/util/FeatureFlags.java

@@ -179,7 +179,6 @@ public final class FeatureFlags {
   @SuppressWarnings("MismatchedQueryAndUpdateOfCollection")
   @VisibleForTesting
   static final Map<String, Object> FORCED_VALUES = new HashMap<String, Object>() {{
-    put(PHONE_NUMBER_PRIVACY, true);
   }};
 
   /**