Add HDMI-CEC service

This CL adds a system service handling HDMI-CEC protocol. The service
is equipped with the capability sending/receiving HDMI-CEC messages

Not all the messages are in place. Currently it has messages to support
a few features only, as follows:

- One touch play
- System information
- Routing control (partially - active source status maintenance only)
- Device OSD transfer
- Power status

It will be extended to cover the wider usages in the follow up CLs.

The CEC standard version referenced in the implementation is 1.3a.

Change-Id: Ifed0b02f52ebf098eddb3bd0987efbf353b7e8fe
diff --git a/Android.mk b/Android.mk
index 7cbc339..0355c62 100644
--- a/Android.mk
+++ b/Android.mk
@@ -130,6 +130,8 @@
 	core/java/android/hardware/ISerialManager.aidl \
 	core/java/android/hardware/display/IDisplayManager.aidl \
 	core/java/android/hardware/display/IDisplayManagerCallback.aidl \
+	core/java/android/hardware/hdmi/IHdmiCecListener.aidl \
+	core/java/android/hardware/hdmi/IHdmiCecService.aidl \
 	core/java/android/hardware/input/IInputManager.aidl \
 	core/java/android/hardware/input/IInputDevicesChangedListener.aidl \
 	core/java/android/hardware/location/IFusedLocationHardware.aidl \