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

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https://hg.mozilla.org/integration/gaia-2_1/rev/3720e327a599
Author: Douglas Sherk <github@sherk.me>
Desc: Merge pull request #26046 from DouglasSherk/1093862-callscreen-ended-calls

Bug 1093862 - Make Callscreen not respond to user input while there are no currently handled calls. r=gtorodelvalle, r=thills
Conflicts:
	apps/callscreen/js/calls_handler.js
	apps/callscreen/test/unit/calls_handler_test.js

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https://hg.mozilla.org/integration/gaia-2_1/rev/65b0b95459eb
Author: Andrew Sutherland <bugmail@asutherland.org>
Desc: Bug 1100860 - [email/UI] message_reader should filter move targets

The message_list card already does this.  Without this fix it's possible to break the back-end, at least for ActiveSync.  Spinning off a separate bug to harden the back-end, specifically ActiveSync.
Bumping manifests a=b2g-bump