Messaging: Use Start and End instead of Left and Right

That way we don't need a separate file for these styles anymore

Change-Id: If689fba727f9b678b628c7bfb51fa8e4474d68de

src/com/android/messaging/ui/conversation/ConversationFragment.java

@@ -545,7 +545,7 @@ public class ConversationFragment extends Fragment implements ConversationDataLi
                     startRect.top -= view.getPaddingTop();
                     startRect.bottom =
                             composeBubbleRect.bottom;
-                    startRect.left += view.getPaddingRight();
+                    startRect.left += view.getPaddingEnd();
 
                     view.setAlpha(0);
                     mPopupTransitionAnimation = new PopupTransitionAnimation(startRect, view);