Add a method to note waking network packets to BatteryStats

This will be used to attribute CPU wakeups to the correct subsystem and
uids when possible.

Test: Builds, boots.

Bug: 265742148
Change-Id: I1a29fc7cbe74990e317f0d62d3894523387bdde1
Merged-In: I1a29fc7cbe74990e317f0d62d3894523387bdde1