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

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https://hg.mozilla.org/integration/gaia-central/rev/46cc04b79c0d
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #14943 from vsireesha246/Bug_938033_Stop_playing_downloaded_video_with_width/height=0

[Video]Bug_938033_[B2G][Helix][yangshiqi][video]the file in attachment can't be...r=johnhu

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https://hg.mozilla.org/integration/gaia-central/rev/a873d9794c8e
Author: varada.sireesha <varada.sireesha@lge.com>
Desc: Indentation is corrected