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

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https://hg.mozilla.org/integration/gaia-central/rev/23df0236d1f9
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #19543 from gaye/backout-950673

Revert "Merge pull request #19372 from alivedise/bugzilla/950673_master/...

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https://hg.mozilla.org/integration/gaia-central/rev/edcebae218b4
Author: gaye <gaye@mozilla.com>
Desc: Revert "Merge pull request #19372 from alivedise/bugzilla/950673_master/delayed-animationend-statechange_v2"

This reverts commit 62e4c86931593fcd913b91de19f76edb75078412, reversing
changes made to 7c55cc2baabc2d66d512768e79b9cbc67bb83040.

Conflicts:
	shared/test/integration/travis-manifest.json
Bumping manifests a=b2g-bump