sepolicy: Put theme service in its own context

Allow the theme manager and its data to be sandboxed in
its own context

Change-Id: I7898663d1c196bfe04fa4c539d20191a43fde284
diff --git a/sepolicy/mediaserver.te b/sepolicy/mediaserver.te
index 4074630..c380ce9 100644
--- a/sepolicy/mediaserver.te
+++ b/sepolicy/mediaserver.te
@@ -1,6 +1,6 @@
 # Themed resources (i.e. composed icons)
-allow mediaserver theme_data_file:dir r_dir_perms;
-allow mediaserver theme_data_file:file r_file_perms;
+allow mediaserver themeservice_app_data_file:dir r_dir_perms;
+allow mediaserver themeservice_app_data_file:file r_file_perms;
 
 # For camera
 allow mediaserver media_rw_data_file:file write;