clang-format: [Java] Improve annotation handling.

Before:
@SuppressWarnings(
    value = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") public static int iiiiiiiiiiiiiiiiiiiiiiii;

After:
  @SuppressWarnings(value = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
  public static int iiiiiiiiiiiiiiiiiiiiiiii;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220284 91177308-0d34-0410-b5e6-96231b3b80d8