lmkd: Add zoneinfo and meminfo parsing routines

/proc/zoneinfo and /proc/meminfo contain information necessary for lmkd
to assess system memory state. Add routines to parse these files.

Bug: 77299493
Bug: 75322373
Change-Id: Ie7d80bbb81fd0d2fc0629f6f678e6afc97fed1f6
Merged-In: Ie7d80bbb81fd0d2fc0629f6f678e6afc97fed1f6
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit da0bc05b2293095c4e1153268ae7b53773f8f5ed)
1 file changed