Fixed the Ping Stress test to line up with new wlan_device changes

There is a change in the wlan_device to make it return the True or
False if the ping was successful or not to align with how Android
returns their ping results.  As a result the ping stress test
needed to be updated to reflect the change.

Bug: None
Test: Ran the test
Change-Id: Icb3a5e6fa7a5c59cfe3f88959c82546635645629
1 file changed
tree: 293f8c526503c6f5c43d4ba946b0553c980966c1
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. OWNERS
  6. PREUPLOAD.cfg