a616d96929
This patches changes how captive portal tests and network lifecycle
events are logged as connectivity events:
- it splits NetworkMonitorEvent into two event classes:
- ValidationProbeEvent for logging individual probe events.
- NetworkEvent for logging network connection, validation,
lingering, and disconnection.
- it removes the redundant CaptivePortalCheckResultEvent class.
The information logged in CaptivePortalCheckResultEvent was already
logged by NetworkMonitorEvent, but missing the evaluation durations.
It is now logged by ValidationProbeEvent.
- it removes the CaptivePortalStateChangeEvent class, which is now
redundant with NetworkEvent, but missing evaluation durations.
In addition, it adds event logging when ConnectivityService puts a
network into lingering or removes a network from lingering.
Bug: 28204408
Change-Id: I8f9752e4d36175ecfcbd1545a01a41bad6e06ea4