MediaRouter: Fix the incorrect documentation of MRCD#onCreateMediaControlView()

Bug: 24719535
Change-Id: I38fb1896266b35891083cac804c2bc21ad1bdcd3
diff --git a/v7/mediarouter/src/android/support/v7/app/MediaRouteControllerDialog.java b/v7/mediarouter/src/android/support/v7/app/MediaRouteControllerDialog.java
index f6363c9..fe33882 100644
--- a/v7/mediarouter/src/android/support/v7/app/MediaRouteControllerDialog.java
+++ b/v7/mediarouter/src/android/support/v7/app/MediaRouteControllerDialog.java
@@ -180,9 +180,8 @@
     }
 
     /**
-     * Provides the subclass an opportunity to create a view that will
-     * be included within the body of the dialog to offer additional media controls
-     * for the currently playing content.
+     * Provides the subclass an opportunity to create a view that will replace the default media
+     * controls for the currently playing content.
      *
      * @param savedInstanceState The dialog's saved instance state.
      * @return The media control view, or null if none.