Fix broken CTS tests.

The default focus highlight should be necessary when the view is
attached to window.

Test: cts-tradefed run singleCommand cts --skip-device-info
--skip-preconditions --abi armeabi-v7a -m CtsViewTestCases -t
android.view.cts.ViewTest
Test: cts-tradefed run singleCommand cts --skip-device-info
--skip-preconditions --abi armeabi-v7a -m CtsWidgetTestCases -t
android.widget.cts.MediaControllerTest
Bug: 37082416

Change-Id: I5d6b0c00b5ba03c8f62e4f71be9336823a73134b