Bug 1315201: Decrease visibility of BottomSheetContextMenu fields. r=sebastian

MozReview-Commit-ID: 259OIlNQI8r

--HG--
extra : rebase_source : b56f134a93012d37201ca00ca4a7ae8aa3926492

mobile/android/base/java/org/mozilla/gecko/activitystream/homepanel/menu/BottomSheetContextMenu.java

@@ -35,8 +35,8 @@ import java.net.URISyntaxException;
 
     private final NavigationView navigationView;
 
-    final View content;
-    final View activityView;
+    private final View content;
+    private final View activityView;
 
     public BottomSheetContextMenu(final Context context,
                                   final ActivityStreamTelemetry.Extras.Builder telemetryExtraBuilder,