Update idegen for guava 27.1

Objects.toStringHelper has been replaced with
MoreObjects.toStringHelper.

Bug: 130306229
Test: m checkbuild
Change-Id: I0110d355aa071f3f5c8174c7dfa3c8403ac8f596
Merged-In: I0110d355aa071f3f5c8174c7dfa3c8403ac8f596
Exempt-From-Owner-Approval: cherry pick
(cherry picked from commit 9502c0fe6ac14513977f9cf251becd4aa8095a54)
2 files changed