Fix sticky rescue party boot

When entering recovery via rescue party, recovery does not call
FinishRecovery() to reset BCB. This causes the rescue party command to
stick, and device keeps rebooting into rescue party mode after entering
bootloader mode and reboot.

Test: enter rescue party, reboot bootloader, fastboot reboot
Bug: 332621855
Change-Id: I958a77ccb2433d76aecb44f8c6f8fedebe08bbe0