Update local state when creating LayerDrawable from constant state

Also clears DrawableContainer's futures list when it's no longer needed,
correctly sets deep copy of state set in StateListDrawable, makes some
private methods into package-protected to avoid thunk, and propagates
state to StateListDrawable's super class so that getState() has correct
information.

Bug: 21840003
Change-Id: I0d4232807f280d663c03b4a80e4aab8626806440