WifiMetricsTest fixes

Add missing @Test.
Add missing verifications for StaEvents generated from mTestStaLogInts.

(cherry picked from commit 38e4d5224e8870484d1f6e028763fc2d6dd62974)
(cherry picked from commit bb3272b409d725dc1aada2cb871f78423ac37c48)

Test: Yes, it is
Bug: 68271729
Bug: 71708302
Merged-In: I505656bc61a87e94edb674db4bbac2f30caa4d48
Change-Id: I505656bc61a87e94edb674db4bbac2f30caa4d48
1 file changed