AudioService: fix audio mode not reset to MODE_NORMAL

when a app call setMode to set mode to non MODE_NORMAL modes many times with different audio managers in the same process, in this case the "pid" parameters are the same and the "cb" parameters are not the same, then the parameter "cb" registered and the "mCb" in hdlr are not the same, then NoSuchElementException will happen, and when the app was cleared in recent tasks the audio mode will not be reseted to MODE_NORMAL by expected flow.

Signed-off-by: wumin3 <wumin3@xiaomi.com>
Change-Id: Ifb8c66372a8e994edcea628cad7dc2a7ee4763a6

Author: wumin3

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

@@ -3392,7 +3392,15 @@ private int setModeInt(int mode, IBinder cb, int pid, String caller) {
                 hdlr = h;
                 // Remove from client list so that it is re-inserted at top of list
                 iter.remove();
-                hdlr.getBinder().unlinkToDeath(hdlr, 0);
+                try {
+                    hdlr.getBinder().unlinkToDeath(hdlr, 0);
+                    if (cb != hdlr.getBinder()){
+                        hdlr = null;
+                    }
+                } catch (NoSuchElementException e) {
+                    hdlr = null;
+                    Log.w(TAG, "link does not exist ...");
+                }
                 break;
             }
         }