Filter out detached views from touch

Views that are detached shouldn't get touch events/start getting
animated (They can't be animated).

Added filter to stream to remove these views from consideration for the
nearest touch frame algo.

Test: Visually + unit test
Bug: 65146195
Change-Id: I74df495a7c02d3d46cd6784f0950c48b5311819e
2 files changed