Add kernel and native memory data to procstats.

We now collect memory use data in the kernel and native
application for aggregation in procstats.  This should
allows us to do aggregated summaries of how memory use
is distributed across the system -- how much is free vs.
how much is in use.

Fix a bug in how we were tracking per-app version codes:
apps that used a shared user id to have multiple packages
run in the same process could get their version codes
cross-wired.  Now we keep track of version codes in the
list of packages associated with a process.

Bumped the checkin version code to 5, so that we can
distinguish checkins that have this corrected data.

Also fix a bug in battery stats monitoring radio state.

Change-Id: I1c849f2df442df679a34ad7b0ca0c5870bfac8df