Seandroid: Allow mm-pp-deamon access to sensor device files

Modify mm-pp-deaemon policy file to enable access to sensors to
support features like AD (Assertive Display).

1. Allow read access to sensor_device.
2. Allow read/write access to sensor_socket.
3. Allow 'connecto' socket call to sensors stream socket.

Change-Id: I343776eb788f39f95f1202463b5d801fb9103571