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

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https://hg.mozilla.org/integration/gaia-central/rev/9a21926ccb0f
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #23406 from cctuan/1059093

Bug 1059093 - [NFC] The sharable content cannot be shared after viewing the received file from notification

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https://hg.mozilla.org/integration/gaia-central/rev/e82de16b69c8
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 1059093 - [NFC] The sharable content cannot be shared after viewing the received file from notification
Bumping manifests a=b2g-bump