BssidBlocklistMonitor history

It's been found that often the local log does not cover enough time for
Bssid blocklist related debugging. This change will make sure that we
will get data on the latest 30 unblocked BSSIDs during bugreport dump.

Bug: 156004955
Test: atest com.android.server.wifi

Change-Id: I16efa8cae4b2cabdc5727aab214b66ccee465a5c
2 files changed