Support Activity Transitions when activity stopped.

Bug 14459812
Bug 14454812
Bug 14450295

A new transport was supported for Activity Transitions
in which convertToTranslucent can now take a Bundle
to transport to the calling Activity. This also allows
waking Activities to regain the communication between
the exiting Activity and the calling Activity.

Change-Id: I29aee14b7e56d9b8b9fb656f382b2c4172b02e14