Policy for priv_app domain

Verifier needs access to apk files.
avc: denied { search } for pid=11905 comm="ackageinstaller" name="vmdl2040420713.tmp" dev="dm-2" ino=13647 scontext=u:r:priv_app:s0:c512,c768 tcontext=u:object_r:apk_tmp_file:s0 tclass=dir permissive=0

Give bluetooth_manager_service and trust_service the app_api_service
attribute.
avc:  denied  { find } for service=bluetooth_manager pid=7916 uid=10058 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:bluetooth_manager_service:s0 tclass=service_manager permissive=0
avc:  denied  { find } for service=trust pid=25664 uid=10069 scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:object_r:trust_service:s0 tclass=service_manager permissive=0

Bug: 25066911
Change-Id: I6be695546f8a951e3329c1ec412936b8637e5835