NetworkMonitor: add log of CaptivePortal result

Add bellow information of CaptivePortalProbeResult for debug:
- isSuccessful
- isPortal
- RedirectUrl
- StartTime
- EndTime

Bug: 116292358
Change-Id: Icfaf0c0ad66a2f3d93dbb72970bb2d3b312ffdb9
1 file changed