Add one-shot remote handler and remote runner interface

This is the shell-transitions equivalent to RemoteAnimationRunner.

The OneShot handler is a utility to directly tie one call of a
remote transition to a specific transition (via
Transitions.startTransition) or as a general holder of a remote
for shell to use (taking care of binder lifetime and wrapping
callbacks).

Bug: 182002789
Test: ShellTransitionTests#testOneShotRemoteHandler
Change-Id: Ia405b133b18b4f132c8c841e74a6a264561df5a3