JAudioTrack: replace MediaPlayer2Impl with MediaPlayer2

Test: cts
Bug: 112549970
Change-Id: I29205dbab0bb09187d0c7c2b5c8ca2d5c3853f32
diff --git a/media/libmediaplayer2/JAudioTrack.cpp b/media/libmediaplayer2/JAudioTrack.cpp
index 3d6879e..768e59e 100644
--- a/media/libmediaplayer2/JAudioTrack.cpp
+++ b/media/libmediaplayer2/JAudioTrack.cpp
@@ -755,7 +755,7 @@
 
 jobject JAudioTrack::createStreamEventCallback(callback_t cbf, void* user) {
     JNIEnv *env = JavaVMHelper::getJNIEnv();
-    jclass jCallbackCls = env->FindClass("android/media/MediaPlayer2Impl$StreamEventCallback");
+    jclass jCallbackCls = env->FindClass("android/media/MediaPlayer2$StreamEventCallback");
     jmethodID jCallbackCtor = env->GetMethodID(jCallbackCls, "<init>", "(JJJ)V");
     jobject jCallbackObj = env->NewObject(jCallbackCls, jCallbackCtor, this, cbf, user);
     return jCallbackObj;