capture BR on wificond or HAL crashes

This allows us to save the most recent kernel logs
when wificond or hal crashes.
This saved log could help us debug underlying driver/kernel
issues.

Bug: 65550505
Bug: 64934608
Test: compile
Test: run frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Test: manually kill wificond and take bugreport
      Find if there is a "Bug dump" section with "reason = 8"

Change-Id: Id9311cee34b3fc25400e804bd96795c7f28f537a
3 files changed