MediaPlayer2: rename Media2DataSource to DataSourceCallback

Test: cts
Bug: 112549021
Change-Id: I4f623d2c94e855f7af51f20a207db05b6da4b221
diff --git a/media/jni/Android.bp b/media/jni/Android.bp
index faf4301..e25e6a5 100644
--- a/media/jni/Android.bp
+++ b/media/jni/Android.bp
@@ -88,7 +88,7 @@
     name: "libmedia2_jni",
 
     srcs: [
-        "android_media_Media2DataSource.cpp",
+        "android_media_DataSourceCallback.cpp",
         "android_media_MediaMetricsJNI.cpp",
         "android_media_MediaPlayer2.cpp",
         "android_media_SyncParams.cpp",