[Bugfix]audio:force show safe volume warning dialog

when 3rd app intercept volume event ,
and using setstreamVolume or adjustsuggeststreamvolume interface ,
but not using SHOW_UI flags,
When the safe volume is reached,
the volume can no longer be adjusted.
At this time, the user should be reminded ．

Signed-off-by: liuxiaoyu7 <liuxiaoyu7@xiaomi.com>
Change-Id: Id8fbbe3f8caf4a85c6ed7bc196f8ed386d29fec8

services/core/java/com/android/server/audio/AudioService.java

@@ -8012,6 +8012,7 @@ public class AudioService extends IAudioService.Stub
         public void postDisplaySafeVolumeWarning(int flags) {
             if (mController == null)
                 return;
+            flags = flags | AudioManager.FLAG_SHOW_UI;
             try {
                 mController.displaySafeVolumeWarning(flags);
             } catch (RemoteException e) {