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

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https://hg.mozilla.org/integration/gaia-central/rev/ae56804d33ea
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #24208 from pivanov/bug-1069820

Bug 1069820 - [Contact] Improve Default Image for Contacts (When Image is Missing)

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https://hg.mozilla.org/integration/gaia-central/rev/553839025cd1
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1069820 - [Contact] Improve Default Image for Contacts (When Image is Missing)

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https://hg.mozilla.org/integration/gaia-central/rev/11800e173ba4
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #24212 from pivanov/bug-1069735

Bug 1069735 - (Settings) Wifi Icon is moved while connecting

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https://hg.mozilla.org/integration/gaia-central/rev/709367b705da
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1069735 - (Settings) Wifi Icon is moved while connecting
Bumping manifests a=b2g-bump