Delay initialization of RarelyUsedPackages and package sampling.

Delay uniform sampling of packages.
Introduce boot time sampling of packages - simplified sampling designed
to save time during start up sequence.

Bug: 150239020
Test: manual verification
Change-Id: I5911b663cfefe324a443b0ba3f97c46e0984a0f3
1 file changed
tree: 8c5fa791da13abb9f68abb8e27dd687ecb391d76
  1. atom_field_options.proto
  2. atoms.proto