Keep local run queue in View to avoid posting to wrong thread

Previously any call to post() while a view was detached would stash the
runnable on a thread-local RunQueue. If the post() call happened off the
UI thread to which the view would later be attached, this would result
in the runnable either failing to run or running on some other UI thread.

Bug: 22828132
Change-Id: I5289ee91ea4b56c45f003a387a9f7f0e6dc050f9