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