[VRR] Update touch boost logic to support Chrome scrolling

When finger is up, we set a timer (30ms or less).
If we get an invalidate, we reset the timer to 3 seconds.

Flag: android.view.flags.toolkit_initial_touch_boost
Bug: 393004744
Test: atest ViewFrameRateTest / atest ViewRootImplTest
Change-Id: Icae5a8a334c39465a2def6f5f428fd98fb8521c1