Backport Transition target enhancement in L

This backports Transition methods introduced in API Level 21.
Developers can specify Transition targets with transition name and View
type in addition to View ID and instance. This also backports match
order of those.

Test: TransitionTest pass on 15, 18, 19, 25
Change-Id: I39a3adf9d683d723c8d6c182ba0c1d1c9bf2826b
8 files changed