Initial round of MediaSession APIs

This is far from complete but puts the basic components in place
for an app to interact with media sessions.

Change-Id: Icfe313f90ad76ae56badbe42b0e43fc5f68db36f
diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index 85e5e23..49ed63d 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -62,6 +62,7 @@
 import com.android.server.lights.LightsManager;
 import com.android.server.lights.LightsService;
 import com.android.server.media.MediaRouterService;
+import com.android.server.media.MediaSessionService;
 import com.android.server.net.NetworkPolicyManagerService;
 import com.android.server.net.NetworkStatsService;
 import com.android.server.notification.NotificationManagerService;
@@ -889,6 +890,13 @@
                 reportWtf("starting Print Service", e);
             }
 
+            try {
+                Slog.i(TAG, "MediaSessionService");
+                mSystemServiceManager.startService(MediaSessionService.class);
+            } catch (Throwable e) {
+                reportWtf("starting MediaSessionService", e);
+            }
+
             if (!disableNonCoreServices) {
                 try {
                     Slog.i(TAG, "Media Router Service");