MediaControlView2: Remove getProvider()

getProvider() is already in the super class.

Test: build
Change-Id: I89e9dc18da248a94fa8b99e04148278558b1169d
diff --git a/core/java/android/widget/MediaControlView2.java b/core/java/android/widget/MediaControlView2.java
index 2e4cccf..5f6d9ce 100644
--- a/core/java/android/widget/MediaControlView2.java
+++ b/core/java/android/widget/MediaControlView2.java
@@ -19,7 +19,6 @@
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.SystemApi;
 import android.content.Context;
 import android.media.session.MediaController;
 import android.media.update.ApiLoader;
@@ -163,14 +162,6 @@
     }
 
     /**
-     * @hide
-     */
-    @SystemApi
-    public MediaControlView2Provider getProvider() {
-        return mProvider;
-    }
-
-    /**
      * Sets MediaController instance to control corresponding MediaSession.
      */
     public void setController(MediaController controller) {