Ensure all FrameTracker invocation run on either main or ui thread FrameTracker has some ViewRootImpl invocations that it would be better to make FrameTracker accesses run on either main or ui thread. Bug: 200938639 Test: atest InteractionJankMonitorTest FrameTrackerTest Change-Id: I91e9536293a694f3d110bda583a32b5918c96c55