Data Usage, materialized!

Asset drop so Data Usage matches new Material spec.  Removes time
dimension sweeps, so we now summarize the entire visible axis.  Fix
time axis labels to not draw outside clip bounds.  Remove pie chart.

No more checkboxes in menus.  Telephony items like roaming are moved
back to cellular settings.  Start wiring up multi-SIM support.

Bug: 15760500, 16019700, 16289924, 16303795
Change-Id: Ie8f4821962319bb82ff4bc2f13f1f66ba1bdfe65