Bumping gaia.json for 8 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/4289832ff1c7
Author: Olle Klang <olle.klang@sonymobile.com>
Desc: Bug 1069791 - Add Firefox OS default theme.

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https://hg.mozilla.org/integration/gaia-2_1/rev/ac743eb2b242
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1071634 - ICE Contacts Group Shortcut seems to be visually incorrect

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https://hg.mozilla.org/integration/gaia-2_1/rev/c17b2416567c
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1072125 - [Settings] position of label and carrier name are wrong

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https://hg.mozilla.org/integration/gaia-2_1/rev/8cda0a4b95e2
Author: David Flanagan <dflanagan@mozilla.com>
Desc: Bug 1068986: convert MediaFrame to use background-image instead of <img>

fix failing unit tests

fix the failing python unit tests with a CSS selector change

fix busted share button by restoring public imageblob property on MediaFrame

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https://hg.mozilla.org/integration/gaia-2_1/rev/e9f36e3e7a34
Author: YFdyh000 <yfdyh000@gmail.com>
Desc: Bug 1061096 - Fix the edit button is not disabled

Conflicts:
	apps/settings/test/unit/downloads_list_test.js

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https://hg.mozilla.org/integration/gaia-2_1/rev/66c8b412a117
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1065519 - Ambient indicator based on list of notifications

Conflicts:
	apps/system/test/unit/notifications_test.js

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https://hg.mozilla.org/integration/gaia-2_1/rev/eca520690762
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #24420 from anefzaoui/bug-964037-v2.1

[v2.1] Bug 964037 - (gaia-rtl) Support RTL for Lockscreen App

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https://hg.mozilla.org/integration/gaia-2_1/rev/ba81593a5add
Author: Ahmed Nefzaoui <nefzaoui.ahmed@hotmail.com>
Desc: [v2.1] Bug 964037 - (gaia-rtl) Support RTL for Lockscreen App
Bumping manifests a=b2g-bump