When a child animator is being manipulated outside of the AnimatorSet, such as when the child animator is running before the AnimatorSet gets started, we need to make sure we maintain the behavoir on N: The child animator will be re-started at its scheduled start time in the AnimatorSet. BUG: 37507882 Test: Repro steps in comment #1 & ag/2144081/ Change-Id: Ib97e85706f01d18a2e72fb4d1d678e22cf959894