The animation scaled was not being factored in early enough in the
activity lifecycle. Also, setCurrentPlaytTime() was not accounting for
the scaled duration correctly. Finally, added setCurrentFraction() as
a more general-purpose seeking facility.
Issue #18222006 Animator duration scale ignored in some situations
Issue #17951668 add ability to seek fraction, not just time
Change-Id: Idad401f5ff5026d7046c36eee09d78a4793215dc
0d1c27a713