Add call to disable RT Animations

HWUI already supports disabling RT animations, but there was no correct
way to call it from the application. Adding a call to enable or disable
RT animations on the RenderThread so RT animations can be disabled
during a blast sync.

Test: Builds
Bug: 200284684
Change-Id: Ia1ae3498c38b84b4975f08d37bc764f0c690ed9f