98e1797367
Note that this CL does not change any behaviour. At the center of this change is CaptivePortalTracker#detectCaptivePortal(), which does nothing except call back into ConnectivityService. Removing it allows us to simplify code in ConnectivityService. It also allows us to remove ConnectivityService#captivePortalCheckComplete which was only ever called in response to this method. While this does not change any behaviour, it preserves existing bad behaviour, i.e, that the CAPTIVE_PORTAL_CHECK NetworkInfo state does not correspond to actual captive portal detection. We transition into that state and immediately (and unconditionally) out of it and into CONNECTED. Change-Id: Ib3797f956d2db5e3cacaaa53e899d81aa8e958af