WifiController: Add delay for letting wifi module clean reset

While doing watchdog recovery, framework immediately does
wifi on after off, it will not fully clean up wifi module.
This commit help wifi module is reset and clean.

Bug: 121391366
Test: Manual test
Test: Unit test
Change-Id: Ic393a009fc1ae3db4d3f879733905d59fa4b4e25
2 files changed