tree 14f721c9a85efab2f6d1be402161340563b74b17
parent 75dc8a494a00a37d19772220fdc639abc05ea3d0
author Ningyuan Wang <nywang@google.com> 1506554379 -0700
committer Ningyuan Wang <nywang@google.com> 1506640643 -0700

Fail scan request if no channels are available

This fails scan request if no available channels could
be scanned for this request.
With this fix we can avoid the freezing of WifiScanner in
aformentioned case.

Bug: 67015387
Test: compile, unit test, integration test
Change-Id: I68654ce8d53104484c1559d8b0525585ab50b9e5