Bumping gaia.json for 11 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/99abcedfe288
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Merge pull request #19785 from pivanov/bug-1017785

Bug 1017785 - [Flame][FM] - Fuzzy images

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https://hg.mozilla.org/integration/gaia-central/rev/fbe43ba85164
Author: Pavel Ivanov <pivanov@mozilla.com>
Desc: Bug 1017785 - [Flame][FM] - Fuzzy images

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https://hg.mozilla.org/integration/gaia-central/rev/7e21290be1fa
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #20148 from zacc/bug_1019891

Bug 1019891

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https://hg.mozilla.org/integration/gaia-central/rev/21613d2c6094
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1021737 - Update test_cleanup_gaia to assert that homescreen scroll to 0 upon touch push

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https://hg.mozilla.org/integration/gaia-central/rev/ae6b9b022516
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1019905 - Xfail test_everythingme_launch_app before migration

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https://hg.mozilla.org/integration/gaia-central/rev/415fdacc51a7
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1019906 - Xfail test_everythingme_search before migration

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https://hg.mozilla.org/integration/gaia-central/rev/cdb4cef3d37f
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1019902 - Disable unmigratable tests test_everythingme_add_collection and test_everythingme_app_install

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https://hg.mozilla.org/integration/gaia-central/rev/4b207cea95fc
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1021098 - [vertical homescreen] Update unit tests for vertical homescreen

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https://hg.mozilla.org/integration/gaia-central/rev/7fd8d052da41
Author: Johan Lorenzo <jlorenzo@mozilla.com>
Desc: Bug 1021069 - [Vertical homescreen] Update references to homescreen in test_ftu_*

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https://hg.mozilla.org/integration/gaia-central/rev/9b232af6cdb8
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1019894 - Migrate test_hs_launch_app.py and test_hs_delete_app.py to vertical homescreen

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https://hg.mozilla.org/integration/gaia-central/rev/76229c13fad8
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1019897 - Migrate test_homescreen_move_app.py to new vertical homescreen layout
Bumping manifests a=b2g-bump