Adds vendor.qti.hardware.bluetooth_sar to redfin_vf FCM.

This is needed because non-VF switched from this HAL to
hardware.google.bluetooth.sar. The old HAL is required in the FCM to
pass check_vintf when merging.

Bug: 176365905
Test: Build and merge, flash and basic BT functionality check.
Change-Id: Ia28bf5d8cd8155dfa5d183317168fac190755771