Wifi usability: Apply the rule of two-minute gap to stats with label_bad

Currently for metrics collection, WifiIsUnusableEvent's are separated by two minutes to avoid duplication.
Apply the same rule to Wifi usability stats collection for label_bad
events.

Bug: 113262380

Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh

Change-Id: I7fb35c37b1abc3037b28abbd16ef1c2335307e40
Signed-off-by: Mingguang Xu <mingguangxu@google.com>
2 files changed