Statsd atom: Wifi on (enabled) and running

BatteryStats logs when Wifi is 'running' and 'on'.
It appears that 'on' is the Wifi on/off toggle, while 'running'
is Wifi actually working. Right now, only Client Mode is considered
running, which is probably wrong - Hotspot mode should probably be
included too.

'Running' is currently used by BatteryStats in its power blaming, so
statsd needs it too. Therefore it is added here, exactly as BatteryStats
uses it. In the future, this should be upgraded to be more accurate, but
that is beyond the scope of this cl.

Test: Manual only. Toggling 'Wifi On' via app is no longer allowed in Q.
Bug: 115639456
Change-Id: Icad7d1476bb6ff0788ffc690f0a27507d32cd4b8