Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/b71cfe209fa1
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #25140 from Cwiiis/bug1082627-collapsed-groups-align-left

Bug 1082627 - Align collapsed group items to the left. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/239517f5d072
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1082627 - Add marionette test to verify collapsing group UX. r=kgrandon

Add a marionette test that verifies that collapsing a group shrinks icons
and that they're left-aligned.

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https://hg.mozilla.org/integration/gaia-central/rev/b2c26b3569d6
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 1082627 - Align collapsed group items to the left. r=kgrandon
Bumping manifests a=b2g-bump