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

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https://hg.mozilla.org/integration/gaia-central/rev/44d06335df26
Author: Ed Morley <emorley@mozilla.com>
Desc: Revert "Bug 1018214 - adding a number of gaia ui tests for status bar and utility tray accessibility. r=Bebe" for intermittent test failures

This reverts commit 9cd529cf12c4de1f6cb12d15a3916510428304c6.

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https://hg.mozilla.org/integration/gaia-central/rev/ff0ee640650b
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Revert "Merge pull request #19965 from justindarc/bug1014955"

This reverts commit dbd4e40dd86d0af6bf69a6bb8babee8a5e226be4, reversing
changes made to 7ba9b2f9c727f1021bd4e9b625cd381214002a98.
Bumping manifests a=b2g-bump