Plumb linklayer channel stats from HAL

Go through the list of channel stats present in WiFiLinkLayerStats-radio
stats and copy onTimeInMs and ccaBusyTimeInMs to framework.

Bug: 79111545
Test: Unit Test
Test: Verified the stats by printing out WiFiLinkLayerStats.toString() manually
Test: ./wifi/tests/wifitests/runtests.sh

Change-Id: I13f8fa533a2d77b8059b89e18cb87580c8cc92cb
3 files changed