WifiManager: add WIFI_MODE_NO_LOCKS_HELD

Add a WifiLock mode representing that no locks are held (@hide).

Bug: 28669096
Change-Id: I774d5ff226e7c639812f9735555c8ea1ed6444af
Test: compiles and runtest frameworks-wifi
(cherry picked from commit df547e04c332e51fff159efe8bf612053a80cf75)
1 file changed