[WifiBridgedApTest] Make an assertion fail statement more clear.

The original statement "length of infos and bands not matched" doesn't
clearly indicate the problem. Change the statement to something like:
"There should be 1 BridgedAp instance, instead of 0".

Bug: 200903293
Test: Local.
Change-Id: Iaffd97060452a4a8e9618f96fbf7b96c04c25951
1 file changed
tree: 80e70975edaecd479c64dca42143d4b3badfdd37
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. OWNERS
  7. PREUPLOAD.cfg