picassowifi: Remove duplicate permission (appears twice)

Change-Id: I821464d32eb761f7d396f02b9bcd2ae7b80eb5b1
picassowifi: sepolicy: Clean-up and fix filesystem encryption

Cleanup some extra selinux rules that I inherited from the
klimtwifi.

Change-Id: Ia528eb3b6f339a0021d4b1b6a3946f00e2bb3e14