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

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https://hg.mozilla.org/integration/gaia-central/rev/7b2d5f3d3709
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #11771 from ian-liu/bluetooth/Bug905944_confirm_receiving_file_while_storage_is_not_available

Bug 905944 - [Bluetooth] Connection would hang after sent a file to a FXOS phone without sd card, r=@alivedise

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https://hg.mozilla.org/integration/gaia-central/rev/3c8e096aaafa
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 905944 - [Bluetooth] Connection would hang after sent a file to a FXOS phone without sd card