Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/dc3dce2c4161
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #19263 from ian-liu/bluetooth/bug1010646_remove_duplicated_string_cancel

Bug 1010646 - [Gaia][Bluetooth File Transfer] Duplicated string 'cancel' in bluetooth.properties. r=@crh0716

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https://hg.mozilla.org/integration/gaia-central/rev/7a433f7f6058
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 1010646 - [Gaia][Bluetooth File Transfer] Duplicated string 'cancel' in bluetooth.properties.

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https://hg.mozilla.org/integration/gaia-central/rev/7509a89c3f62
Author: Ian Liu <iliu@mozilla.com>
Desc: Merge pull request #19233 from ian-liu/bluetooth/bug1010106_reuse_bluetooth_helper_in_shared_folder

Bug 1010106 - [Gaia][Bluetooth] Reuse Bluetooth helper in shared folder. r=@etiennesegonzac

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https://hg.mozilla.org/integration/gaia-central/rev/38999383df32
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 1010106 - [Gaia][Bluetooth] Reuse Bluetooth helper in shared folder.
Bumping manifests a=b2g-bump