Wifi usability: Comments from API review council are addressed

Addressed the following comments from API review council:
1. Rename WifiUsabilityStatsListener to OnWifiUsabilityStatsListener.
2. Add @ProbeStaus in probeStatusSinceLastUpdate.
3. Rename probeElapsedTimeMsSinceLastUpdate to
ProbeElapsedTimeSinceLastUpdateMs.

Bug: 126391553
Bug: 126699865
Bug: 113262380

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

Change-Id: I426cd7375cffa5bfe97540ee7d7980741cc5c0f9
Signed-off-by: Mingguang Xu <mingguangxu@google.com>
4 files changed