Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/acdd49e980cb
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #24668 from albertopq/1074033-overlap-statusbar-2

Bug 1074033 - Edge gestures overlapping r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/94981b85dd05
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1074033 - Edge gestures overlapping

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https://hg.mozilla.org/integration/gaia-central/rev/02cb123e7361
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #24671 from albertopq/1075105-remove-ambient-lockscreen

Bug 1075105 - Not showing ambient indicator in LockScreen r=mhenretty

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https://hg.mozilla.org/integration/gaia-central/rev/2bb70bcf0e05
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1075105 - Not showing ambient indicator in LockScreen
Bumping manifests a=b2g-bump