Don't update volume in AudioService when SAM is on and ARC is off

This prevents volume from changing on TV panels when a connected
amplifier sends <Report Audio Status>.

Tests omitted because of AOSP incompatibilities.

Test: manual with Isto and Atom
Bug: 182369742

Change-Id: I412ee9d5b1ba7aab382e73deab8ac19546175842
Merged-In: I412ee9d5b1ba7aab382e73deab8ac19546175842

services/core/java/com/android/server/hdmi/HdmiControlService.java

@@ -1289,6 +1289,7 @@ public class HdmiControlService extends SystemService {
     void setAudioStatus(boolean mute, int volume) {
         if (!isTvDeviceEnabled()
                 || !tv().isSystemAudioActivated()
+                || !tv().isArcEstablished() // Don't update TV volume when SAM is on and ARC is off
                 || !isHdmiCecVolumeControlEnabled()) {
             return;
         }