[Aware] dynamic enabled ranging with discovery session

Only enable aware ranging when at least one of the discovery session has
ranging enabled.

Bug: 159163836
Test: atest com.android.server.wifi
Change-Id: Iad58972e881cb44b3aabcd6235d5b8a7901e6c71
8 files changed
tree: 5cbda87f0b650210aec1bc51113a4eb8c725ae0d
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg