Convert hidl_bitfield and bitfield to int am: c9d3b7b9d6 am: f60e5afd6f am: 54068d9df2

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1937403

Change-Id: Ic178d497eb70799a516c9055fbdf6f52cbe7fc89