Collect RSS metrics for all processes.

Added features:
rss of all the running processes.
sum the rss for the processes with the same process name.
add new process count metric.

Bug: b/148571373

Test: RssSnapshotHelperTest.
Change-Id: I75c3d7ce90d5edb995b79a3faa85f4244bc2f5e7
3 files changed
tree: c1d51cb79b1cb99b8f8abfa8592ca8588116f3b7
  1. PREUPLOAD.cfg
  2. build/
  3. docs/
  4. emu_test/
  5. libraries/
  6. scripts/
  7. tests/
  8. utils/