Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/3f2f3d2162bd
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #18987 from AndreiH/bug_1006469

Bug 1006469 - Fix test_cards_view_with_two_apps.py, flicks in wrong dire...

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https://hg.mozilla.org/integration/gaia-central/rev/24a23a72f1a1
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1006469 - Fix test_cards_view_with_two_apps.py, flicks in wrong direction
Bumping manifests a=b2g-bump