chore: update CONTRIBUTING.md to include code formatting (#534) (#61)
chore: update CONTRIBUTING.md to include code formatting (#534) (#61)

Co-authored-by: Jeff Ching <21aaffda9718a203d3f6dfde95bf7c5668b929a6@google.com>
Co-authored-by: Jeffrey Rennie <fafd7683bacfe7b2a9e6efe49c100265dc8f7035@google.com>

Source-Author: Brian Chen <684014430c75252f005480fe4703428b58ccc3c2@google.com>
Source-Date: Tue May 12 10:24:59 2020 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 5b48b0716a36ca069db3038da7e205c87a22ed19
Source-Link: https://github.com/googleapis/synthtool/commit/5b48b0716a36ca069db3038da7e205c87a22ed19
googleapis/java-mediatranslation,googleapis/java-mediatranslation,googleapis/java-mediatranslation