clang-format: [Java] Improve cast detection.

Before:
  a[b >> 1] = (byte)(c() << 4);

After:
  a[b >> 1] = (byte) (c() << 4);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222827 91177308-0d34-0410-b5e6-96231b3b80d8