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

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https://hg.mozilla.org/integration/gaia-central/rev/724943c2c3e2
Author: EragonJ (E.J.) <eragonj@eragonj.me>
Desc: Merge pull request #26898 from EragonJ/bug-1111903-update

Bug 1111903 - [Settings] Refactor Dialog Service with l10n best practice...

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https://hg.mozilla.org/integration/gaia-central/rev/40636bd7b8a0
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1111903 - [Settings] Refactor Dialog Service with l10n best practices

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https://hg.mozilla.org/integration/gaia-central/rev/833c5a6e423c
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #26878 from crh0716/1111712

Bug 1111712 - Check the existence of the bluetooth item r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/0537e5552c0c
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1111712 - Check the existence of the bluetooth item
Bumping manifests a=b2g-bump