GitLab

- Add 'conc_priority' command
- Fix handling a single channel concurrency case: If conc_priority
  is not set, advertise the frequency conflict to the framework and
  disable the new connection attempted
- When P2P Interface gets removed due to single channel frequency
  conflict, show GROUP_REMOVE reason=FREQ_CONFLICT
- Fix sched scan processing

Change-Id: Ie6fe105cebd379a0a9c49ace62d2e48e71571107
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>