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

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https://hg.mozilla.org/integration/gaia-central/rev/64c56e6c5e48
Author: Ed Morley <emorley@mozilla.com>
Desc: Revert "Bug 967516 - Enable DEVICE_DEBUG by default for non production builds r=ochameau" for assertions and timeouts

This reverts commit abda39c78b25d6dbcf8cc7eba2c59086871b5da1.

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https://hg.mozilla.org/integration/gaia-central/rev/fcd7915aded3
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Merge pull request #18090 from justindarc/bug991953

Bug 991953 - [Camera][Buri] Timer turns sideways or upside down when fil...

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https://hg.mozilla.org/integration/gaia-central/rev/0948043854ef
Author: Justin D'Arcangelo <justindarc@gmail.com>
Desc: Bug 991953 - [Camera][Buri] Timer turns sideways or upside down when filming video

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https://hg.mozilla.org/integration/gaia-central/rev/0c9603ca37f6
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #18132 from gaye/disable-caldav-test

Revert "Merge pull request #17813 from evanxd/bug-987351"

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https://hg.mozilla.org/integration/gaia-central/rev/8a9c07fa98c8
Author: Gareth Aye <gaye@mozilla.com>
Desc: Revert "Merge pull request #17813 from evanxd/bug-987351"

This reverts commit 7efa9ab3234207fd2fd818a5c1411f390619dbfc, reversing
changes made to 89691d2d1a98aef25f3937fbe995413a5d943abe.

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https://hg.mozilla.org/integration/gaia-central/rev/c1bce3d6e753
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #18121 from AndreiH/993358

Bug 993358 - Extra step in test_everythingme_app_install.TestEverythingM...

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https://hg.mozilla.org/integration/gaia-central/rev/22422c9eae0e
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 993358 - Extra step in test_everythingme_app_install.TestEverythingMeInstallApp
Bumping manifests a=b2g-bump