Use existing localizations for formatting data usage [DO NOT MERGE]

This partially reverts I5be9bb7ce3b11709117da698d6c03610f4e5e40e in
order to use existing localizations and also avoid hard to localize
strings.

Also, we now bidi wrap the usage value, since it may break in the RTL
locales otherwise.

Bug: 28747101
Change-Id: Ibc03632cccfe671164cfbb670a423ada1177db65