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

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https://hg.mozilla.org/integration/gaia-central/rev/0297af6d882c
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #18146 from pivanov/bug-993039

Bug 993039 - [VDR][Music] Apply Buttons and Input areas [BB]

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https://hg.mozilla.org/integration/gaia-central/rev/ea2bfdd2612e
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 993039 - [VDR][Music] Apply Buttons and Input areas [BB]

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https://hg.mozilla.org/integration/gaia-central/rev/4a9b1214be84
Author: gitmai <mri@tid.es>
Desc: Merge pull request #18167 from gitmai/bug-993949-CC-adding-test

Bug 993949 -[Cost Control] Follow up to add unit test for bug 986358
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/3d35154844b9
Author: mai <mri@tid.es>
Desc: Bug 993949 -[Cost Control] Follow up to add unit test for bug 986358
Bumping manifests a=b2g-bump