Add a new system service: MediaCommunicationService

Bug: 175511943
Test: MediaCommunicationService can run.
      'adb shell service list' shows the service.
Change-Id: I81a1e11d96d1d30a29760507be6fe04592afcf70
diff --git a/apex/media/service/api/system-server-removed.txt b/apex/media/service/api/system-server-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/apex/media/service/api/system-server-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0