bcl: Add Mitigation Logger - library

Mitigation Logger logs battery related information for 1 second when it
is triggered by under voltage or over current interrupts.  Information
collected is to help debug system brownout.

Bug: 228383769
Test: Boot and Test
Signed-off-by: George Lee <geolee@google.com>
Change-Id: If2e84c2bdbe2e613895c33831c7dc1695525dc0c
7 files changed