Fix and clean up Tv Pip Menu

Fix for Tv Pip Menu not properly setting custom actions provided by an
application.
Fix Pip Menu not closing on the Home button press.
Simply and revise Tv Pip Menu implementation which now consists of 3
classes:
- TvPipMenuController
- TvPipMenuView (formerly PipMenuView)
- TvPipMenuActionButton (formerly PipControlButtonView)
and thus spare
- PipControlsView
- PipControlsViewContoller

Bug: 174818743
Test: atest WMShellFlickerTests:TvPipBasicTest
Test: atest WMShellFlickerTests:TvPipMenuTests
Test: atest WMShellFlickerTests:TvPipNotificationTests
Change-Id: I9e08ca142e0407a4ede084323b0201194a7e89b8