Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/f1982f4a4663
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #16964 from dominickuo/bug-973156-new-2

Bug 973156 - [Music] Send mozinterruptbegin and mozinterruptend to system for show/hide the media playback widget, r=jimporter(cherry picked from commit b83a79969718ea189cdc5cfa55d40fee38c11cb6)

Conflicts:

	apps/system/test/marionette/media_playback_test.js
Bumping manifests a=b2g-bump