Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/e244511ccd9f
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #25776 from pivanov/bug-1072087

Bug 1072087 - [Settings] The Forward icon looks incorrect

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https://hg.mozilla.org/integration/gaia-central/rev/9f60a769d08b
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1072087 - [Settings] The Forward icon looks incorrect

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https://hg.mozilla.org/integration/gaia-central/rev/99aed4e913f2
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #25653 from pivanov/bug-1091610

Bug 1091610 - [video] outline offset to play button background

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https://hg.mozilla.org/integration/gaia-central/rev/70e9ca9329f4
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1091610 - [video] outline offset to play button background
Bumping manifests a=b2g-bump