Reland "JNI Zero: Add support for @JniType("std::map<>")"

This reverts commit d41db24b.

Reason for reland: Preserved internally-referenced method

Original change's description:
> Revert "JNI Zero: Add support for @JniType("std::map<>")"
>
> This reverts commit 9751b38f.
>
> Reason for revert: Broke internal chrome:
> https://ci.chromium.org/ui/p/chrome/builders/ci/android-arm-rel-ready/24606/overview
>
> Original change's description:
> > JNI Zero: Add support for @JniType("std::map<>")
> >
> > Serializes the Map to an Object[], and then populates a std::map (or
> > similar).
> >
> > Bug: 326110639
> > Change-Id: Iaa72e11ebac6c11a711845e99c98551969a7351f
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5615691


> > Commit-Queue: Andrew Grieve <agrieve@chromium.org>
> > Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#1313601}
>
> Bug: 326110639
> Change-Id: Ie434b43f9fb2c7aad51477ee4e9783ee48ae79d2
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5621956


> Auto-Submit: Andrew Grieve <agrieve@chromium.org>
> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/main@{#1313666}

Bug: 326110639
Change-Id: Idca2af1a11038455a7cd6de0752e5188e344215b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5626136


Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1314043}