am b84291bb: Merge "Support showing "Cold" battery health."

Merge commit 'b84291bbecb1ab8141cf8f56fd3d1523e5c707a6' into gingerbread-plus-aosp

* commit 'b84291bbecb1ab8141cf8f56fd3d1523e5c707a6':
  Support showing "Cold" battery health.