clang-format: [Java] Fix class declaration line breaks.

Before:
  @SomeAnnotation()
  abstract
      class aaaaaaaaa<a> extends bbbbbbbbbbbb<b> implements cccccccccccc {
  }

After:
  @SomeAnnotation()
  abstract class aaaaaaaaa<a> extends bbbbbbbbbbbb<b>
      implements cccccccccccc {
  }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221256 91177308-0d34-0410-b5e6-96231b3b80d8