Always save message permission choice

For current design, message sharing option only display when
mapPermisson != CachedBluetoothDevice.ACCESS_UNKNOWN. MAP permisson only
saved when user reject requset twice or accept request, if user just
reject once, permission will be ACCESS_UNKNOWN and message sharing
option will not display. This patch remove the check of
MessageRejectionCount and always save message permission choice.

Bug: 120291728
Test: reject message access request and check device details page
Change-Id: I071491d3c4134ed348e195f054b6557e397cdd6a