Add sepolicy for music recognition service.

Denial when not listed in priv_app.te:
E SELinux : avc:  denied  { find } for pid=3213 uid=10170 name=music_recognition scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:music_recognition_service:s0 tclass=service_manager permissive=0


Bug: 158194857
Test: patched and tested on internal master
Change-Id: I30e9ea79a57d9c353b732b629bd5a829c89bbcb0
diff --git a/private/priv_app.te b/private/priv_app.te
index 57dcfc5..c718574 100644
--- a/private/priv_app.te
+++ b/private/priv_app.te
@@ -38,6 +38,7 @@
 allow priv_app mediaextractor_service:service_manager find;
 allow priv_app mediametrics_service:service_manager find;
 allow priv_app mediaserver_service:service_manager find;
+allow priv_app music_recognition_service:service_manager find;
 allow priv_app network_watchlist_service:service_manager find;
 allow priv_app nfc_service:service_manager find;
 allow priv_app oem_lock_service:service_manager find;