Add auto-cancel ability to ObjectAnimator

Add a method that enables a new auto-cancel option to
ObjectAnimator. When set, any ObjectAnimator (when started) will
cause any running ObjectAnimator instance (with that flag set)
that has the same target and properties to cancel() itself prior
to starting the new one.

Issue #7426129 Add auto-cancel to animators

Change-Id: I586659c365289cdb9afb6c416bdbaf5630477149