This change starts tracking traffic quality data for WiFi and mobile
networks. The quality is tracked based on incidental traffic, and not
on specific measurements. Theoretical bandwidths are hard-coded, as
well as sampling interval; although sampling interval can be changed
by setting a system policy.
Bugs filed to remove shortcomings of this change -
10342372 Change LinkInfo name to something better
10342318 Move hardcoded values of MobileLinkInfo to resources
so they can be updated without changing code
Bug: 10006249
Change-Id: I83d8c7594da20fe53abbd5e1f909b1f606b035bb
1f12cb52a4