clang-format: [Java] Fix class declaration formatting.

Before:
  @SomeAnnotation()
  abstract
      class aaaaaaaaaaaa extends bbbbbbbbbbbbbbb implements cccccccccccc {
  }

After:
  @SomeAnnotation()
  abstract class aaaaaaaaaaaa extends bbbbbbbbbbbbbbb
      implements cccccccccccc {
  }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221121 91177308-0d34-0410-b5e6-96231b3b80d8