Collect tcpdump when failed for wifi related tests am: 5579e1af0c

Original change: https://android-review.googlesource.com/c/platform/tools/test/connectivity/+/1510488

Change-Id: I140b82535f182c829fda17c9c742e80d99e230fb
tree: f47389b88798f7d14297c1ee0306b347db79b2ab
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. OWNERS
  7. PREUPLOAD.cfg