Fix Weird floating "add language" item

- Base theme has android:clipToPadding=false attribute. It let user
UI draw under navigation bar but also cause this problem. Add
android:clipToPadding=true in layout to fix the problem.

Fixes: 142108980
Test: manual
Change-Id: Ibe60b348a3c7c01d9786612ceac23a47a78a208a

src/com/android/settings/datetime/timezone/BaseTimeZonePicker.java

@@ -83,7 +83,7 @@ public abstract class BaseTimeZonePicker extends InstrumentedFragment
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
-        final View view = inflater.inflate(R.layout.time_zone_items_list, container, false);
+        final View view = inflater.inflate(R.layout.recycler_view, container, false);
         mRecyclerView = view.findViewById(R.id.recycler_view);
         mRecyclerView.setLayoutManager(new LinearLayoutManager(getContext(),
                 LinearLayoutManager.VERTICAL, /* reverseLayout */ false));