Android: Add @JniType() to CableAuthenticator

* Adds ConvertArray specializeation for vector<uint8_t>

Bug: 326465150
Change-Id: Ief297d6b60ac798af157dd2fa46402aaf41dddd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5399000


Reviewed-by: Adam Langley <agl@chromium.org>
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1278989}