Metrics for hardware reliability reporting

Add event metrics for hardware reliability reporting.

Events include:
 - Battery Health Snapshot
 - Battery Charge cycles
 - Physical Drop
 - Hardware Failed
 - USB Audio Device insertion & removal
 - USB Connector insertion & removal

Bug: 69978775
Test: Logged events from Pixelstats HAL
Change-Id: I9389f71ffe85a430273f33650503f714ea308a78