[VRR] Support setRequestedFrameRate() with AVDs

Fixes: 342666766

Adds support for Animated Vector Drawables that operate on the
Render Thread to VRR. The votes from their respective Views
are considered on each vote.

Test: new tests, manual testing
Change-Id: I1e761d62e5bc4a706cc7fb2904f26aaa68e87584