Fix issue #10671878: Proc stats needs to remove old data structures

We now keep track of which process and service states are actively
in use, and remove any that are not in use during a commit.  The
activity manager needed to be tweaked to report this data, and ensure
it does not try to operate on one of these structures when not in
use.

Also some other fixes:

- We now keep track of process names associated with services, for
display in the UI.
- Keep track of total run time for each service, also for UI.
- The parceled format is more efficient, not storing duplicates of
process/package names, and writing times as ints when possible.
- Reduced commit period from 1 day to 12 hours, so that our UI can
be a little closer at its attempt to display the stats over 1 day.

Change-Id: Ifeda0ffe963a7b49d8eb2a3f6923f3a5e71a4e43