Remove libmetricslogger dependency from bootstats

These are either already migrated or are planned to be migrated to
statsd.

Bug: 147777989
Bug: 148575354
Test: compiles
Merged-In: I00b110dcf5cf4a0fb1673fe05004662b6f3327d0
Change-Id: I00b110dcf5cf4a0fb1673fe05004662b6f3327d0
2 files changed