Handle PiP params changes in onTaskInfoChanged

Before, there were two paths for listening to pip params changes, either
via onTaskInfoChanged (only handle aspect ratio changes the same way for
all form factors) and PinnedTaskListener.
Now all PiP params changes are handled in onTaskInfoChanged and use
similar listeners to allow for different behavior for different form
factors.
Also adds a TvPipTaskOrganizer so that only relevant params are checked.

Bug: 218456378
Bug: 220042536
Bug: 228854691
Test: atest PinnedStackTests

Change-Id: I673ab69ee9253db782c41da96695b5a374345086