This way an app store can shift blame for update-related network
traffic onto the app that is being updated.
Using a well-known tag makes it easy for developers to identify
that they didn't explicitly request the traffic at runtime, similar
to how backup/restore traffic is handled.
Bug: 38282350
Test: builds, boots
Change-Id: I003dd7c9615d4ab318250f1e44fa5d195ac94d23
f23a5e104b