CEC: Add a method to control standby mode of the device

Bug: 35318128
Test: m -j40
Change-Id: If787f8be5cfd82263e297d53841c1e0dc99c7c80
diff --git a/core/java/android/hardware/hdmi/IHdmiControlService.aidl b/core/java/android/hardware/hdmi/IHdmiControlService.aidl
index c1e924e..67e2d18 100644
--- a/core/java/android/hardware/hdmi/IHdmiControlService.aidl
+++ b/core/java/android/hardware/hdmi/IHdmiControlService.aidl
@@ -71,4 +71,5 @@
     void clearTimerRecording(int recorderAddress, int sourceType, in byte[] recordSource);
     void sendMhlVendorCommand(int portId, int offset, int length, in byte[] data);
     void addHdmiMhlVendorCommandListener(IHdmiMhlVendorCommandListener listener);
+    void setStandbyMode(boolean isStandbyModeOn);
 }