Merge "CEC: Implement handleReportArcInitiate method" am: b36f38b8aa

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1589691

Change-Id: Ib98ea5394f46197c3ebe7960829e8ebf346ce87e

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

@@ -557,8 +557,12 @@ public class HdmiCecLocalDeviceAudioSystem extends HdmiCecLocalDeviceSource {
     @ServiceThreadOnly
     protected boolean handleReportArcInitiate(HdmiCecMessage message) {
         assertRunOnServiceThread();
-        // TODO(amyjojo): implement report arc initiate handler
-        HdmiLogger.debug(TAG + "Stub handleReportArcInitiate");
+        /*
+         * Ideally, we should have got this response before the {@link ArcInitiationActionFromAvr}
+         * has timed out. Even if the response is late, {@link ArcInitiationActionFromAvr
+         * #handleInitiateArcTimeout()} would not have disabled ARC. So nothing needs to be done
+         * here.
+         */
         return true;
     }