[Cast,Android] Remove TransportXX dependency from ExpandedControllerActivity

third_party/android_media/README.chromium

Index: third_party/android_media/README.chromium
diff --git a/third_party/android_media/README.chromium b/third_party/android_media/README.chromium
index 0354ea66a1a7b1591bddd0c9421f8d0190430547..5ca4a462b788346cb874da80854edc8bb3d7697e 100644
--- a/third_party/android_media/README.chromium
+++ b/third_party/android_media/README.chromium
@@ -1,5 +1,5 @@
-Name: MediaController android sample.
-URL: https://android.googlesource.com/platform/development/+/master/samples/Support4Demos/src/com/example/android/supportv4/media/MediaController.java
+Name: MediaController Android sample.
+URL: https://android.googlesource.com/platform/development/+/b356564/samples/Support4Demos/src/com/example/android/supportv4/media/MediaController.java
 Version: 74c5bcff29959931c8a4b15e4afa613975a47f4c
 License: Apache 2.0
 Security Critical: no
@@ -8,12 +8,13 @@ Description:
 This contains a modified copy of MediaController.java and the associated
 resources.
 
-MediaController.java is based on a public supportv4 android sample available
-as part of the Android support libraries installation (see
-http://developer.android.com/tools/support-library/index.html). It is also
-available from:
-https://android.googlesource.com/platform/development/+/master/samples/Support4Demos/src/com/example/android/supportv4/media/MediaController.java
-
+MediaController.java is based on a public Android sample that was
+available as part of the Android support libraries installation (see
+https://developer.android.com/tools/support-library/index.html). It is
+also available from:
+https://android.googlesource.com/platform/development/+/b356564/samples/Support4Demos/src/com/example/android/supportv4/media/MediaController.java
 
 Local Modifications:
-The only changes are some minor bug fixes.
+- TransportController and TransportMediator are replaced with a custom
+  interface
+- minor bug fixes.