Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/1df1f6148693
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Merge pull request #12716 from fcampo/MMS-settings-button-923024

Bug 923024 - [MMS] Add settings button on top bar (r=rwaldron)

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https://hg.mozilla.org/integration/gaia-central/rev/46aa61bc55e0
Author: Fernando Campo <fernando.campo@o2.com>
Desc: Bug 923024 - [MMS] Add settings button on top bar

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- Create options button
- Call OptionsMenu
- Settings Activity
- Added tests