Blame scan request from WifiManager.reconnect()

Bug: 65839442
Test: compile, unit tests
Test:
1. Write a simple cts test case WifiManagerTest#testWifiReconnect
    only calling WifiManager.reconnect()
2. Make sure wifi is disconnected
3. Run cts test using:
cts-tradefed run cts -m CtsNetTestCases -t
    android.net.wifi.cts.WifiManagerTest#testWifiReconnect
4. Grab bugreport
5. Verify the following logs appears:
    forceConnectivityScan in request of WorkSource{...}

Change-Id: I7fa7803e90ba950c9331a55cb1268baef4ae02a8
4 files changed