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

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https://hg.mozilla.org/integration/gaia-central/rev/216b81b7a464
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #24823 from viorelaioia/bug_1078229

Bug 1078229 - Update test_settings_dsds_cell_data.py to reflect changes ...

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https://hg.mozilla.org/integration/gaia-central/rev/466d5e7a0c4f
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1078229 - Update test_settings_dsds_cell_data.py to reflect changes from Bug 1077259
Bumping manifests a=b2g-bump