Add outline to tv pip menu arrows

In order to have an outline for the arrows, we draw them
programmatically instead of in xml with vector drawables.

This way, we can ensure that the Path for the drawable is
the same as the Path for the ViewOutlineProvider.

Bug: 220108601
Test: atest TvPipMenuController
Test: flash and check arrows are visible over white background

Change-Id: I965e9ac33f474012446b6f8096edf39d93a0c92e