Add API to create bond between two devices using existing btif API.

Successfully create an SSP connection between the DUT and the CERT using classic bluetooth.
This will be required for HFP profile related tests in the future.
The SSP is done using Passkey Confirmation.

Bug: 261221333
Test: mma -j $(nproc)
Test: ./build.py
Test: system/gd/cert/run --clean --topshim
Tag: #floss
Change-Id: Ib0b874ea18fc81d845ba422d339b97126d84f883