Bumping gaia.json for 8 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/3bc887499724
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #12195 from rnowm/settings-margins

Bug 913015 - [Settings] Buttons are not using 1.5rem margins

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https://hg.mozilla.org/integration/gaia-central/rev/d3b92723f7be
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 913015 - [Settings] Buttons are not using 1.5rem margins

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https://hg.mozilla.org/integration/gaia-central/rev/ee9a9a8d7dbc
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Revert "Merge pull request #12163 from jmcanterafonseca/bug_details_matching"

This reverts commit c0ff597baabf4433b767421d9a513b95f40c406a, reversing
changes made to 4e6c0c9ea2f8ef78634295f52e48f5f8e695c776.

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https://hg.mozilla.org/integration/gaia-central/rev/daa7a4c1cbc0
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #12193 from alivedise/bugzilla/913896_alive/audio-capture-permission-debug

Bug 913896 - audio capture permission, r=alive+timdream

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https://hg.mozilla.org/integration/gaia-central/rev/bcc575589ba7
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 913896 - Part 2, fix custom event bug.

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https://hg.mozilla.org/integration/gaia-central/rev/db0a0f8b01c6
Author: gasolin <gasolin@gmail.com>
Desc: Bug 913896 - Display audio (microphone) permission in permission acquisition prompt

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https://hg.mozilla.org/integration/gaia-central/rev/006c82c11544
Author: Michal Budzynski <michal@virtualdesign.pl>
Desc: Merge pull request #12179 from fabi1cazenave/fdn-bug888912

Bug 888912 - Entering Numbers into FDN List

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https://hg.mozilla.org/integration/gaia-central/rev/039ba49055a7
Author: Michal Budzynski <michal@virtualdesign.pl>
Desc: Bug 888912 - Entering Numbers into FDN List