Add new atom to log userspace reboot performance

A first stab at the atom to log.
Actual logic to log will be in the follow up CL.

Test: builds
Bug: 148767783
Change-Id: Id3f81ced73ea708f1dcfbcfd66f554e8daed8ccc
Merged-In: Id3f81ced73ea708f1dcfbcfd66f554e8daed8ccc
(cherry picked from commit c5e8683c324efdb2643c40cb4b5a9eb3673a615c)
1 file changed
tree: 4b8b9349772128cfeccf54c31b7f8b2ace742d16
  1. atom_field_options.proto
  2. atoms.proto