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

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https://hg.mozilla.org/integration/gaia-central/rev/0ff9a1a906ca
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #21154 from crh0716/1029303

Bug 1029303 - Not discover bluetooth devices in background r=eragon

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https://hg.mozilla.org/integration/gaia-central/rev/118daad27dd4
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1029303 - Not discover bluetooth devices in background

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https://hg.mozilla.org/integration/gaia-central/rev/4dd75faec6cc
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #21090 from EragonJ/bug-1020769

Bug 1020769 - [Settings] Enter 10 times invalid PUK code, nothing shown,...

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https://hg.mozilla.org/integration/gaia-central/rev/05a46561a1e0
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1020769 - [Settings] Enter 10 times invalid PUK code, nothing shown, signal bar looks like searching for network
Bumping manifests a=b2g-bump