Statsd logs directly from Wifi & add Multicast tag

Track the Wifi Multicast Lock tag.
Also moves some statsd Wifi logging calls out of BatteryStats in
preparation for more detailed statsd wifi logging.

Bug: 68943452
Test: cts-tradefed run cts-dev -m CtsStatsdHostTestCases -t android.cts.statsd.atom.UidAtomTests#testWifiMulticastLock
Test: cts-tradefed run cts-dev -m CtsStatsdHostTestCases -t android.cts.statsd.atom.UidAtomTests#testWifiScan
Change-Id: I13bd5f72393f6065bc3dfa1b72a1ca48a480a682