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

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https://hg.mozilla.org/integration/gaia-central/rev/0f2a699bcd28
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #22235 from cctuan/1041467-M

Bug 1041467 - [MTBF] App only covers top half of the screen

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https://hg.mozilla.org/integration/gaia-central/rev/a638657e855d
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1041467 - [MTBF] App only covers top half of the screen
Bumping manifests a=b2g-bump