Fix HdmiCecLocalDevice concurrent access

Original implementation of HdmiCecLocalDevice expected only one thread
refers ActionList. The concurrent access causes system_server crash.
To enable for each thread to refer own ActionList without any conflict.

Test: Sanity Test on Android TV connected to AVR.
      Repeat screen off and on quickly.

Change-Id: I66f42dfbbd8d193f8a02d3ec5d51783149ddfeb2

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

@@ -660,7 +660,8 @@ abstract class HdmiCecLocalDevice {
     @ServiceThreadOnly
     void startQueuedActions() {
         assertRunOnServiceThread();
-        for (HdmiCecFeatureAction action : mActions) {
+        // Use copied action list in that start() may remove itself.
+        for (HdmiCecFeatureAction action : new ArrayList<>(mActions)) {
             if (!action.started()) {
                 Slog.i(TAG, "Starting queued action:" + action);
                 action.start();