Update codeStyleSettings.xml

Summary:
We have applied some Google Java Format styles in our code style, for example order of imports.

This updates the project's code style file to keep these consistent.

Reviewed By: lambdapioneer

Differential Revision: D5546425

fbshipit-source-id: ec112e668c10c6a0dd7bf54cc1159ae194f1babc

Author: kirwan