Change HighHint category to ignore ExplicitDefault

Change HighHint category to only ignore votes with ExplicitDefault. This
is an stand-in solution for games, which use `setFrameRate` with default
compatibility.

Bug: 321107394
Bug: 315071842
Test: atest libsurfaceflinger_unittest
Test: Feature manual test on 60 Hz vote game
Test: Regression fix manual test on home screen, app tray, etc.
Change-Id: Iee4f7fdfb6c967aa8aba1f3c05fcec7d70259985