Allows earlier interaction lock release by polling on display updates to
stop happening (becomes idle) for a programmable amount of time.
Bug: 62110101
Test: Ran UiBench, didn't see regressions
susbset of tests - avg-jank:
testInflatingListViewFling: 0.09
testTrivialListViewFling: 0.15
Change-Id: I83c0fc75a3d7ca5bf76910ebbaeddb69343a7ee2