Modular DRM for MediaPlayer

Bug:    34559906
Test:	Manual through the test app
Change-Id: Ib69d4fe6b0e21f162f08cea061260c683e4b8c9b

public/mediaserver.te

@@ -95,6 +95,9 @@ allow mediaserver processinfo_service:service_manager find;
 allow mediaserver scheduling_policy_service:service_manager find;
 allow mediaserver surfaceflinger_service:service_manager find;
 
+# for ModDrm/MediaPlayer
+allow mediaserver mediadrmserver_service:service_manager find;
+
 # /oem access
 allow mediaserver oemfs:dir search;
 allow mediaserver oemfs:file r_file_perms;