libmeminfo: add KReclaimable to the fields read from meminfo

Provide means of reading KReclaimable stats from /proc/meminfo.

Bug: 138148041
Test: dumpsys meminfo
Test: libmeminfo_test
Change-Id: I393318fcf6a805e0ac9ab7f93c57e76123acfc0b
Merged-In: I393318fcf6a805e0ac9ab7f93c57e76123acfc0b
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
3 files changed