[WifiCoex] Add neighboring unsafe channel utility

Add utility method for calculating the set of unsafe neighboring
channels.

Bug: 153651001
Test: atest CoexUtilsTest
Change-Id: I266588cfa4bcc505e680b236e4c0f96782658d50
2 files changed
tree: 188fd73249b4ebda687e773a3486ebc8e9b9b1d9
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg