Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/346beed705f4
Author: Yi-Fan Liao <begeeben@gmail.com>
Desc: Revert "Bug 1049685 - [Tarako][Settings] Ringer's name overlay Alerts in Sound setting page"

This reverts commit c4ba26551979b0293fd168bfcc30d07a5efeed70.
Bumping manifests a=b2g-bump