[RTT][CTS] Add information to assert to help debug failures

Modify the assert message to print out the # of failures and the total
number of iterations. Will help diagnose scope of test failures.

Bug: 109836816
Test: atest WifiRttTest
Change-Id: Ic4d5b6844225edbd9704694c539e31754b7a340c
1 file changed
tree: ac1d4e3a46df3aa39125f65e18da13a5654f1b80
  1. tests/