clang-format: [Java] Improve line breaks around annotations.

clang-format: [Java] Improve line breaks around annotations.

Before:
  @SomeAnnotation("With some really looooooooooooooong text") private static final
      long something = 0L;

  void SomeFunction(@Nullable
                    String something) {}

After:
  @SomeAnnotation("With some really looooooooooooooong text")
  private static final long something = 0L;

  void SomeFunction(@Nullable String something) {}

llvm-svn: 220984