DO NOT MERGE CEC: Queue actions for starting later when not ready

Requests coming in while the service is still being brought up
were discarded. Changed to queue them so that they can be started
after the initialization is completed.

Bug: 17985588
Change-Id: Ic9d9cd2094b830c80dec54dd5ef6a18159a74dc7

Conflicts:
	services/core/java/com/android/server/hdmi/HdmiCecLocalDevicePlayback.java