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

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https://hg.mozilla.org/integration/gaia-central/rev/1cc1b0c407e3
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #25911 from davidflanagan/bug1085212

Bug 1085212: release video hardware before sharing and restore when done r=russn

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https://hg.mozilla.org/integration/gaia-central/rev/b279dcd3a253
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1085212: release video hardware before sharing and restore when done

Followup fix for bug 1088456: use playerShowing instead of playing so the patch works even if we are paused

address review comments
Bumping manifests a=b2g-bump