Changing updateApp to private

Author: Manny Jimenez

firebase-app-distribution/src/test/java/com/google/firebase/app/distribution/FirebaseAppDistributionTest.java

@@ -442,7 +442,7 @@ public void updateAppTask_whenNoReleaseAvailable_throwsError() {
     firebaseAppDistribution.setCachedNewRelease(null);
     when(mockSignInStorage.getSignInStatus()).thenReturn(true);
 
-    UpdateTask updateTask = firebaseAppDistribution.updateApp(false);
+    UpdateTask updateTask = firebaseAppDistribution.updateApp();
 
     assertFalse(updateTask.isSuccessful());
     assertTrue(updateTask.getException() instanceof FirebaseAppDistributionException);