Update frame rate category changing logic

This CL is created to avoid the unnecessary (frequent) frame rate
category update. One observed scenario is that when a Video and an
animation have different invalidation intervals and sizes, it can cause
the frameRateCategory to be updated repeatedly.

To resolve this issue, we introudce counters for different category.
Everytime a category is voted, the value of the counter is set to 5 and
this value will be decrease by 1 every frame. When the value of a
counter is greater than 0, it will be taken into consideration when
determining the category to be set.

If the ViewRootImpl doesn't receive a vote of a category in 5 frames,
the category won't be taken into consideration anymore.

Test: atest ViewRootImplTest
Change-Id: I71e1f95381bc696865c50c2dc41a03f1646f5924