Suppress deprecation warning in CallFragment.

webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java

Index: webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java
index 8482de07a38a7cd1d208904a810791c1d35af92c..09014993155addd0e16079e5f2b00bc367ab3638 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallFragment.java
@@ -129,6 +129,8 @@ public class CallFragment extends Fragment {
     }
   }
 
+  // TODO(sakal): Replace with onAttach(Context) once we only support API level 23+.
+  @SuppressWarnings("deprecation")
   @Override
   public void onAttach(Activity activity) {
     super.onAttach(activity);