Revert "Upgrade error_prone annotations to 2.4.0"

Revert submission 1472525-guava

Reason for revert: b/173193638
Reverted Changes:
I08f24c514:Upgrade error_prone annotations to 2.4.0
I4077b6ae3:Upgrade guava to v30.0

Exempt-From-Owner-Approval: revert
Change-Id: I1177314ee1e0d175cf16f80cf80321a65df5e0dc
16 files changed