tree 16251e55b9cc1cb7d6e626d16cad64d163d32e50
parent 389bb5c70c24d51b812305e738b27b6a64cb2a88
author Kai Shi <kaishi@google.com> 1574226957 -0800
committer Kai Shi <kaishi@google.com> 1578591648 -0800

Wifi: add the initial version of WifiHealthMonitor and related changes.

1) Add the new WifiHealthMonitor class for daily and post-boot detection.
2) Add PerNetwork for per-network/SSID connection stats collection in WifiScoreCard.
3) Add NetworkStats in scorecard.proto for persistent storage per-network stats.
4) Update scanDetail cache even if network selection is skipped.
5) Do memory store write after receiving ACTION_SHUTDOWN message.

Bug: 141753195
Test: manual test with various phones and APs.
      1) Periodically enable and disable WiFi and check daily stats report
       and stats report with reduced daily detection interval.
      2) Change SW build and check post-boot SW build change detection.

Test: unit test with atest com.android.server.wifi

Change-Id: Ic7c348260ecb7a17e65f8280a4225bb8365c93e1