Reland "[CCA] Auto generated .grd file"

This reverts commit f8c1f2a273c115bd6195dd733cfd06a092e4defa.

Reason for revert: Reland after fixing

Original change's description:
> Revert "[CCA] Auto generated .grd file"
>
> This reverts commit c1fa5d1fda1ebcd5c0f51aabff212ccdea25b3da.
>
> Reason for revert: breaking build on chromeos -- blocking chrome uprev
>
> Original change's description:
> > [CCA] Auto generated .grd file
> >
> > This CL leverages generate_grd() template to automatically generate the
> > .grd file for the camera app so that we don't need to maintain the .grd
> > file manually.
> >
> > Bug: b/176412450
> > Test: Build and deploy successfully and CCA works normally
> >
> > Change-Id: I7d727c7200fe6b5d6491284b3205f680fd805a40
> > Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2603762
> > Reviewed-by: Samuel Huang <huangs@chromium.org>
> > Reviewed-by: Toni Baržić <tbarzic@chromium.org>
> > Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
> > Reviewed-by: Shik Chen <shik@chromium.org>
> > Commit-Queue: Wei Lee <wtlee@chromium.org>
> > Auto-Submit: Wei Lee <wtlee@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#852625}
>
> TBR=tbarzic@chromium.org,shik@chromium.org,huangs@chromium.org,ortuno@chromium.org,wtlee@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com
>
> # Not skipping CQ checks because original CL landed > 1 day ago.
>
> Bug: b/176412450, 1177362
> Change-Id: I8101a0cacbf57291653f0ea48bb44c022ccd5bf0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2691652
> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
> Commit-Queue: Jun Mukai <mukai@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#853379}

TBR=tbarzic@chromium.org,mukai@chromium.org,shik@chromium.org,huangs@chromium.org,ortuno@chromium.org,wtlee@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com,rubber-stamper@appspot.gserviceaccount.com

# Not skipping CQ checks because this is a reland.

Bug: b/176412450
Bug: 1177362
Change-Id: I7a64d451c12f885aed0863bfc78f720077c13ad3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2693146
Reviewed-by: Wei Lee <wtlee@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Wei Lee <wtlee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#855099}