Update procstats to start collecting/reporting pss.

Completely reworked how it manages its data, since trying
to keep track of all of the possible pss data with the old
data structures would have made it huge.  Now we have a sparse
data structure for pss and process times.  (Will switch service
times over to it soon.)

Currently the only thing that collects pss data is running
"dumpsys meminfo".  More will be added later.

Modified checkin output to also scale better as more distinct
data categories are added, and added output of pss data.  Now
instead of dumping every possible entry as a comma-separated
list, it dumps a comma-separated list of only the entries with
data, tagged with the state they go with.

Also fixed some problems in the checkin reporting of batterystats
(it needs to escape commas), added checkin reporting of the history
list, fixed parsing of kernel wake locks to strip quotes, fixed
wake lock name that the sync manager generates to be more sane.

Change-Id: Ibf4010838a9f685ebe1d93aff86c064ccc52b861