Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/0c35454a428e
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #16124 from rnowm/img-compression

images optimized

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https://hg.mozilla.org/integration/gaia-central/rev/3385104d071f
Author: rnowm <arnau@arnaumarch.com>
Desc: images optimized
Bumping manifests a=b2g-bump