Bumping gaia.json for 6 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/31681e1eff48
Author: Ran Ben Aharon <ran@everything.me>
Desc: Merge pull request #10576 from EverythingMe/879582-everything.me-scrollbars

[Bug 879582] Returned Evme shortcuts scrollbar

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https://hg.mozilla.org/integration/gaia-central/rev/fbb119323d6e
Author: Ran Ben Aharon <ran@ranbena.com>
Desc: [Bug 879582] Returned Evme shortcuts scrollbar

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https://hg.mozilla.org/integration/gaia-central/rev/043fdb346f08
Author: Rex KM Lee <rexboy@mozilla.com>
Desc: Merge pull request #10437 from cctuan/883091

Bug 883091 - [Dialer] Autosuggestion is not working properly when a cont...

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https://hg.mozilla.org/integration/gaia-central/rev/d190a7bd973d
Author: gduan <gduan@mozilla.com>
Desc: fix wrong character, replace name of variables, simplerify simplePhoneMatcher

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https://hg.mozilla.org/integration/gaia-central/rev/1ed821f0d9b0
Author: gduan <gduan@mozilla.com>
Desc: use simple_phone_matcher to filter numbers and remove useless comment

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https://hg.mozilla.org/integration/gaia-central/rev/502ddc81bf4b
Author: gduan <gduan@mozilla.com>
Desc: Bug 883091 - [Dialer] Autosuggestion is not working properly when a contact has two phone number with the same string