Further MemoryTracker robustness:

- grab a copy of the tracked processes list in the dumper
- scan running processes when memorytracker starts to catch
  pids that may have survived a crash of the tracker's process
- use RunningServiceInfo to figure out roughly how long a
  service scanned in this way has been alive

Change-Id: I861642f07183e3945f7a7a41e1e5144567e17e13
3 files changed