Bumping gaia.json for 7 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/e30f84943825
Author: Jim <jporter@mozilla.com>
Desc: Bug 1091137 - [ringtones] Fix clearing out the tonePlayer's state when hiding the app

Conflicts:
	apps/ringtones/js/tone_player.js

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https://hg.mozilla.org/integration/gaia-2_0/rev/c8f924a06bb0
Author: Luke Chang <lchang@mozilla.com>
Desc: Bug 1083053 - [Midori] The screenshot preview window still overlays an app when switching apps

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https://hg.mozilla.org/integration/gaia-2_0/rev/8148107c84d1
Author: Salvador de la Puente <salva@unoyunodiez.com>
Desc: Bug 1043762 - Volume buttons don't do anything in Settings and previewing new ringtones

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https://hg.mozilla.org/integration/gaia-2_0/rev/7ca6c0a85945
Author: ian-liu <iliu@mozilla.com>
Desc: Bug 1085201 - [Flame][Tako][v2.1][Settings] "Searching device" not hidden as Sony SBH50 BTHS paired via NFC

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https://hg.mozilla.org/integration/gaia-2_0/rev/de744bca49a0
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 1048673 - [Ringtones] stop the previews before leaving the app

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https://hg.mozilla.org/integration/gaia-2_0/rev/04452c26fc43
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #25990 from snowmantw/bug1089529-2.0

Bug 1089529 - Lockscreen error after screen off and on when device shows...

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https://hg.mozilla.org/integration/gaia-2_0/rev/ee115df90690
Author: Greg Weng <snowmantw@gmail.com>
Desc: Bug 1089529 - Lockscreen error after screen off and on when device shows NFC shrinking UI
Bumping manifests a=b2g-bump