Bumping gaia.json for 4 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/7405487508e2
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Merge pull request #12203 from comoyo/globalkey

Bug 910713 - Global key isnt hidden if there is only one layout. r=RudyL

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https://hg.mozilla.org/integration/gaia-central/rev/d18133b60624
Author: Jan Jongboom <janjongboom@gmail.com>
Desc: Bug 910713 - Global key isnt hidden if there is only one layout

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https://hg.mozilla.org/integration/gaia-central/rev/f329d89b9b55
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #12234 from EragonJ/bug-914317

Bug 914317 -  [B2G] [Bluetooth] "Unable to Pair" message has placeholder text. r=@alivedise

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https://hg.mozilla.org/integration/gaia-central/rev/32bfa536a0d0
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 914317 - Add a check to remove title in prompts