sepolicy:policy changes to allow ptt/cnss_diag service to access sdcard

ptt_socket_app/cnss_diag service needs access to /sdcard or
/mnt/media_rw/sdcard1 for wlan logging.

Change-Id: Ia965f43508c3079a0efd42149df734314bb178af
CRs-Fixed: 849081
1 file changed