WifiConnectivityManager: Refactor for automotive STA + STA (Part 2)

The secondary CMM for automotive needs asynchronous handing of scan
results. Refactor the existing flow to use asynchronous callback.

Bug: 169413079
Test: atest com.android.server.wifi
Change-Id: Ic944e474f1dc258ed86d45113b7788c96f6514ec
1 file changed
tree: 20d25c03e24f43e3bcf2f6218506234e12fd68e3
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg