Killing the WifiWatchdogService thread from
WifiService can cause messages to be handled on
a dead thread. Quit the thread on the broadcast
instead.
A couple of more fixes:
- Do an asynchronous bring up of Wifi. This will
allow WifiWatchdogServiceThread to be immediately
brought up, instead of relying on an update.
- There is no need to listen on supplicant connection
in wifiwatchdog anymore. We kill the thread when
supplicant connection is no more.
Bug: 2546756
Change-Id: I15a188e031bc79856c55aabdd271287b0df0377d
b99fe5e622