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

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https://hg.mozilla.org/integration/gaia-central/rev/09f42917c050
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #23985 from yzen/bug-1066455

Bug 1066455 - added captions ability to the screen reader. Added a 'Disp...

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https://hg.mozilla.org/integration/gaia-central/rev/0f86bfaf2693
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1066455 - added captions ability to the screen reader. Added a 'Display output' screen reader setting. r=alive, arthurcc

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https://hg.mozilla.org/integration/gaia-central/rev/91cc772738bb
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #23603 from EragonJ/bug-1042135

Bug 1042135 - Revert do not track preferences to be a simple on/off swit...

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https://hg.mozilla.org/integration/gaia-central/rev/dd0960bf8851
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1042135 - Revert do not track preferences to be a simple on/off switch
Bumping manifests a=b2g-bump