CEC: Make sure CEC switch info is always updated

The CEC switch information was not updated as expected if
Device Discovery action is in progress. Refactored to have the
update routine gets called regardless of the presence of action.

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

Bug: 16931883
Change-Id: I629e8b646bef54599c1a706bf1c797ecebf8616b