Clarify documentation about annotating AutoValue fields. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=123808538
Clarify documentation about annotating AutoValue fields.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=123808538

MaTriXy/auto,eamonnmcmanus/auto,google/auto,google/auto,eamonnmcmanus/auto,MaTriXy/auto,google/auto,eamonnmcmanus/auto