Bug 915450 - [Web Notifications] allow to inspect notification properties. r=bz
Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/dd3c70c2565f
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #12107 from crh0716/914152

Bug 914152 - Add a selector for choosing DTMF tones r=evelyn

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https://hg.mozilla.org/integration/gaia-central/rev/ae540b5323bc
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 914152 - Add a selector for choosing DTMF tones