wpa_supplicant reassociate timing test

Test to benchmark the performance of wpa_supplicant reassociate operation.
Specifically the time taken from the start of the scan to being connected.

BUG=chromium:348673
TEST=Run this test

Change-Id: I079d75cc8ac96a9fbcd6dc2112e2b0b787d975ce
Reviewed-on: https://chromium-review.googlesource.com/188780
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Tested-by: Peter Qiu <zqiu@chromium.org>
Commit-Queue: Peter Qiu <zqiu@chromium.org>
5 files changed