Recommended IntelliJ code style settings are out of date

I downloaded and imported the GoogleStyle code style settings xml, as recommended in Contributing.md. It doesn't seem like this project and its checkstyle are actually conforming to those style settings (which is fine, I like the prevailing gRPC style better!) A few things in particular keep coming up:
- Import order: GoogleStyle has static imports at the bottom, doesn't separate grpc imports. This is configured in `Code Style > Java > Imports > Import Layout`.
- Method argument wrapping: GoogleStyle has method call arguments and declaration parameters on the next line aligned to the opening paren. This is configured in `Code Style > Java > Wrapping and Braces > Method declaration parameters > Align when multiline`, as well as the same option under `Method call arguments`.

Start with Contributing.md and the recommended GoogleStyle code style settings XML, then compare its IntelliJ import layout and method wrapping options with the project's checkstyle and prevailing gRPC style. Done means the recommendation and settings consistently describe the intended import order and method argument or parameter wrapping.

索引モデルが issue の本文から書いたものです。