Mass clean up: don't cast class when not needed.

Bug: none
Test: rebuild
Change-Id: Ie3f58a3d5ae99ade28a33dcac80c18de90d4d5b2

src/com/android/settings/bluetooth/BluetoothDetailsHeaderController.java

@@ -52,8 +52,7 @@ public class BluetoothDetailsHeaderController extends BluetoothDetailsController
 
     @Override
     protected void init(PreferenceScreen screen) {
-        final LayoutPreference headerPreference =
-                (LayoutPreference) screen.findPreference(KEY_DEVICE_HEADER);
+        final LayoutPreference headerPreference = screen.findPreference(KEY_DEVICE_HEADER);
         mHeaderController = EntityHeaderController.newInstance(mFragment.getActivity(), mFragment,
                 headerPreference.findViewById(R.id.entity_header));
         screen.addPreference(headerPreference);