Fix adjust volume call on MediaDeviceUpdateWorker

Volume adjustment for MediaDevice is now available through
LocalMediaManager. This is a non-functional change.

Test: Presubmit.
Bug: 192657812
Change-Id: I1f85f4b914c00b7075daa9be52b34e63836df8e3

src/com/android/settings/media/MediaDeviceUpdateWorker.java

@@ -239,7 +239,7 @@ public class MediaDeviceUpdateWorker extends SliceBackgroundWorker
      */
     public void adjustVolume(MediaDevice device, int volume) {
         ThreadUtils.postOnBackgroundThread(() -> {
-            device.requestSetVolume(volume);
+            mLocalMediaManager.adjustDeviceVolume(device, volume);
         });
     }