Accept the pairing request automatically for the set member pairing

Check the pairing request from which device that if it's the outgoing
set member pairing, accept the pairing request automatically to make the
CSIP pairing seamless.

Bug: 178981521
Bug: 150670922
Test: Pair one of the CSIP device, and confirm the other set member can
paired without the confirmation from user

Change-Id: I40afabb09b4cb12a0253035452c9f6974799ed05
Merged-In: I40afabb09b4cb12a0253035452c9f6974799ed05