CEC: Reset active source status on routing control

Set active source status to false when broadcast routing control
commands indicate other device is about to be the new active source.

Bug: 17840270
Change-Id: I176e21ec8789624e29421b912ba641a21f0f5f21

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

@@ -183,6 +183,8 @@ final class HdmiCecLocalDevicePlayback extends HdmiCecLocalDevice {
     private void maySetActiveSource(int physicalAddress) {
         if (physicalAddress == mService.getPhysicalAddress()) {
             mIsActiveSource = true;
+        } else {
+            mIsActiveSource = false;
         }
     }