Reland "Split vr's generate_jni() target into two"

This reverts commit f0cc215a.

Reason for reland: Updated #include paths

Original change's description:
> Revert "Split vr's generate_jni() target into two"
>
> This reverts commit 345d44c4.
>
> Reason for revert: Suspected cause for build failure.
> See https://bugs.chromium.org/p/chromium/issues/detail?id=1394271.
>
> Original change's description:
> > Split vr's generate_jni() target into two
> >
> > This should prevent the default classloader from being cached for the vr
> > split, which then causes incorrect values when installing the DFM on T+
> > devices.
> >
> > Bug: b/258453540
> > Change-Id: Idd2753aa6fd4539dce9949a5289e99d5c3c90eca
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4062308


> > Reviewed-by: Clark DuVall <cduvall@chromium.org>
> > Commit-Queue: Andrew Grieve <agrieve@chromium.org>
> > Owners-Override: Andrew Grieve <agrieve@chromium.org>
> > Cr-Commit-Position: refs/heads/main@{#1076505}
>
> Bug: b/258453540
> Change-Id: I7bd15bd8309ef96551991c368565bf4891ad1ef3
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4059951
> Auto-Submit: Hailey Wang <haileywang@google.com>
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Owners-Override: Hailey Wang <haileywang@google.com>
> Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/main@{#1076571}

Bug: b/258453540
Change-Id: I1e78f633021b8b9a5b645c35d653ed70f4dfcba2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4064299


Owners-Override: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Auto-Submit: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1077094}