Update remote display API.

Renamed disconnect() to dispose() to emphasize the fact that
this method is intended to clean up the IRemoteDisplay
completely, not just temporarily disconnect the current client
(which might be useful someday).

Other minor tweaks.

Change-Id: I1209639eb0cd8af09c724206642d7e52aab48257
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 9005500..423d6ce 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -283,7 +283,7 @@
 
 sp<IRemoteDisplay> MediaPlayerService::listenForRemoteDisplay(
         const sp<IRemoteDisplayClient>& client, const String8& iface) {
-    return new RemoteDisplay(client, iface.string());;
+    return new RemoteDisplay(client, iface.string());
 }
 
 status_t MediaPlayerService::enableRemoteDisplay(const char *iface) {
@@ -299,7 +299,7 @@
     }
 
     if (mRemoteDisplay != NULL) {
-        mRemoteDisplay->disconnect();
+        mRemoteDisplay->dispose();
         mRemoteDisplay.clear();
     }