Add Subsystem Restart(SSR) detection.

Failed the Passed test case if Subsystem Restart occurred.

1.Test Passed, But DUTs have SSR rump:
  - Fail the test.
  - Sample log: https://paste.googleplex.com/6325057534558208

2.Test Failed + Any one of the DUTs has SSR dump:
  - Two different Error message shown
  - Sample log: https://paste.googleplex.com/4808091929935872

Bug: None
Test: act.py
Change-Id: Id8a917b98eff1c30267086fd7025efb67e1d21c4
3 files changed
tree: b57eb6a48b45f06d67b865b7a830bb999be5262c
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. LICENSE
  7. OWNERS
  8. PREUPLOAD.cfg