Allow mediadrmservice to access processinfo

Needed to support session reclaiming

bug: 27916039
Change-Id: I464e6db5b9bc4e83f85cb4623eeca340e1efd603

mediadrmserver.te

@@ -48,6 +48,7 @@ allow mediadrmserver tee:unix_stream_socket connectto;
 
 allow mediadrmserver mediadrmserver_service:service_manager { add find };
 allow mediadrmserver mediaserver_service:service_manager { add find };
+allow mediadrmserver processinfo_service:service_manager find;
 
 # only allow unprivileged socket ioctl commands
 allowxperm mediadrmserver self:{ rawip_socket tcp_socket udp_socket }