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

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https://hg.mozilla.org/integration/gaia-central/rev/24c69552568a
Author: Guillaume C. Marty <gmarty@users.noreply.github.com>
Desc: Merge pull request #26033 from gmarty/Bug-1066243-Battery-indicator-not-always-properly-updating-when-charging-disconnecting

Bug 1066243 - [Status Bar][Battery] Battery indicator not always properl...

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https://hg.mozilla.org/integration/gaia-central/rev/ff53c830f4a6
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1066243 - [Status Bar][Battery] Battery indicator not always properly updating when charging/disconnecting
Bumping manifests a=b2g-bump