[roll] Roll fuchsia Reland "[pkg] Switch ota manifest to protobuf"

This reverts commit 667dd7218cc84bb0b9b0d5f70b3e72686131cdbb.

Reason for revert: fxrev.dev/1521207 should fix the flake

Original change's description:
> Revert "[pkg] Switch ota manifest to protobuf"
>
> This reverts commit b7fc34f9cd688c9fab9a65871da7fb4b2091af5e.
>
> Reason for revert: Parent CL possibly caused system-updater-test
> to flake
> Example failure: http://go/bbid/8688857739038444817
>
> Original change's description:
> > [pkg] Switch ota manifest to protobuf
> >
> > SignedManifest will be added in a follow up commit.
> >
> > Original-Bug: 479282494
> >
> > Change-Id: Ifed9242009d8c9036e90cf9c043df81d82ae738f
> > Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1455221
> > Fuchsia-Auto-Submit: Sen Jiang <senj@google.com>
> > Reviewed-by: Ben Keller <galbanum@google.com>
> > Commit-Queue: Sen Jiang <senj@google.com>
> > Reviewed-by: Aidan Wolter <awolter@google.com>
>
> Original-Bug: 479282494
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Change-Id: I72190f65bd4f7fbcaa8a1433dd95395f809c211d
> Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1521216
> Exempt: RubberStamper 🤖 <android-build-ayeaye@system.gserviceaccount.com>
> Commit-Queue: Yilong Li <liyl@google.com>

Original-Bug: 479282494
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1521518
Original-Revision: 6d8d0b90c77fa90fe0264d672da67c5e09bff783
GitOrigin-RevId: 43ff3766cada2b1225d7dd11663e11fea111e364
Change-Id: I5b92bc16f61add6faf58ac1794d8d887dbc92591