Fix AVR compatibility.

Not to start ARC action if ARC has been already established
It’s a device compatibility issue happened with Sony amplifier str-dn860.
Occasionally ARC won’t be able to be established after connect the amplifier to TV through HDMI ARC.

Bug: 133329521

Change-Id: I857e2457cb682e810a940b0698d4bb635bebd1de
1 file changed