tree cf1f68e03b1288c42334d857a7f7be41610bfb07
parent 470817b13e56d915805729ab4f51075f3fa2ec15
author Ningyuan Wang <nywang@google.com> 1505766816 -0700
committer Ningyuan Wang <nywang@google.com> 1507165625 -0700

Do not trigger scan for reconnect() when wifi is connected

According to the document of WifiManager.reconnect(), we only
try to connect when wifi is disconnected.
This CL adds the handling of CMD_RECONNECT in WifiStateMachine
for L2ConnectedState to avoid unnecessary scans and connection
attempts.
This also adds the handling of CMD_RECONNECT for WpsRunningState,
which just logs and ignores this command because in WpsRunningSate
we are attempting to connect and when we leave and head to disconnected
state, we will trigger a scan anyway.

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 connected
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 log appears:
"Ignore CMD_RECONNECT request because wifi is already connected"

Change-Id: I7aa7842653aa4eaf8d70946dc8e120d3814ffc09