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

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https://hg.mozilla.org/integration/gaia-central/rev/89e0c53c16ec
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Revert "Bug 1038698 - Disable intermittent test_a11y_utility_tray_visibility.py for TBPL"

This reverts commit 7e8c5220a51b631524b2e528766b820a92a05c9b.

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https://hg.mozilla.org/integration/gaia-central/rev/00137b2498cd
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Revert "Merge pull request #21704 from Cwiiis/bug1038185-close-utility-tray-transition"

This reverts commit 6bfbb48a79302c59220d83acfe896ea0abcf5aab, reversing
changes made to 8c0db75e19f1faf1de47733cfac9b05d988fee28.
Bumping manifests a=b2g-bump