[WifiCoex] Add harmonic interference algorithm utility method

Add a utility method to calculate the unsafe wifi channels from harmonic
interference from the given cell uplink channel.

Bug: 153651001
Test: atest CoexUtilsTest
Change-Id: I046a5330a87d4297fc312c9e33a1f33b0cd508f2
2 files changed
tree: 8d7d9b55c0ad06c7c2669195aa6d58d857b481ce
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg