Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/e9705799bd9f
Author: cctuan <georgeiscoming@gmail.com>
Desc: Revert "Bug 903919 - [Flatfish][Gallery] add support for large device"

This reverts commit a206eac5a8ac8743270d01846c2bf004b56cf02c.
Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/8bdef350c0a6
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #12182 from alivedise/bugzilla/915070/app-default-channel

Bug 915070 - Default volume control channel for app, r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/00bb233e918e
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 915070 - Default volume control channel for app