Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/f8c197a12708
Author: Ben Kelly <ben@wanderview.com>
Desc: Revert "Merge pull request #15748 from wanderview/ogg-to-opus"

This reverts commit 01156db30d0a4d62c1776e2a6c7c0c25e2b20b52, reversing
changes made to adb5bc457e014b6b91c464cefba42e9abe9800ba.

Conflicts:
	apps/system/js/icc_worker.js
	test_apps/uitest/tests_html/API/audiotag.html
Bumping manifests a=b2g-bump