clang-format: Tweak -style=Chromium for Java files.

For Java, don't do any of the deviations from Google Style that Chromium style
does for C++.

Chromium's Java follows Android Java style [1], which is roughly Google Java
style with an indent of 4 and a continuation indent of 8.

1: https://source.android.com/source/code-style.html



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222839 91177308-0d34-0410-b5e6-96231b3b80d8