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

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https://hg.mozilla.org/integration/gaia-central/rev/136b1e777e39
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Merge pull request #18249 from davidflanagan/bug995432

Bug 995432: simple continuous auto focus support r=jdarcangelo

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https://hg.mozilla.org/integration/gaia-central/rev/887e77d6987b
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 995432: simple continuous auto focus support

use autoFocus/resumeContinuousFocus to ensure focused pictures
Bumping manifests a=b2g-bump