In addition, make the code less confusing and more future proof:
- initialize the JSArrayBufferView bit_field to 0 (not only zeroing the
relevant bits)
- serialize it as uint32, since it's an uint32.

Bug: v8:11111
Change-Id: Iffbbb27cc8c821587f992668bfbcf2448a776f15
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3300132Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78075}