Wifi: SubSystem Restart for SoftAP + STA concurrency

SoftAp need to restart, when interface down event comes from
Tethering module on softap0 interface. Broadcast an intent about sub system
restart and handle this intent in WifiService. In WifiService do the
following actions for sub system restart

1. Disable SoftAP
2. Disable Wifi
3. Enable Wifi
4. Enable SoftAP

Change-Id: Icd09436701d8287c0c777e2b7fc24f2a78ffee62
CRs-Fixed: 1072131
4 files changed
tree: 3720828ade6c02dfc07b0c7278484c73668aae57
  1. service/
  2. tests/