[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
Merged-In: Iad58972e881cb44b3aabcd6235d5b8a7901e6c71
Change-Id: Iad58972e881cb44b3aabcd6235d5b8a7901e6c71
(cherry picked from commit 6a9bedadbd0629786167ef23cc145f4f3cddfb7b)
8 files changed
tree: a2075b33cd7cabb6a7d91a74b4c228ad710c02da
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg