Add process_time metric for returning pids and their time

Changed fake.py to add functions needed for testing process_time

Bug: None
Test: process_time_metric_test.py
Change-Id: I13772e2d7752d174711cb2399077b0bf3475823f
3 files changed
tree: f8adbdc870b6ecec20e6f633c92bdf8e36d7f826
  1. acts/
  2. tools/
  3. Android.mk
  4. PREUPLOAD.cfg