Bump up duration for bss scans

There are some AP's that take more than
180s to become visible in scan. Hence
giving few slow AP's more time before they are ready.

BUG=None
TEST=None

Change-Id: I159ed239920304a423c83fa7db5e67429e43b615
Reviewed-on: https://gerrit.chromium.org/gerrit/64299
Reviewed-by: Kris Rambish <krisr@chromium.org>
Commit-Queue: Bindu Mahadev <bmahadev@chromium.org>
Tested-by: Bindu Mahadev <bmahadev@chromium.org>
1 file changed