- Mark Serialize method as non-virtual
- Use simple scheme to mask out bytes when de-/serializing Uint32

- Improve ByteArray::ByteArrayPrint method

Drive-by-fix: 
Change-Id: I9a6779587c0a031bcf23e4f431d17026b83a808d
Reviewed-on: https://chromium-review.googlesource.com/c/1387493Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58428}