Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/ef8350c2184d
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19131 from KevinGrandon/bug_841422_move_simple_phone_matcher_test

Bug 841422 - Follow-up, move simple_phone_matcher test into sharedtest

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https://hg.mozilla.org/integration/gaia-central/rev/1935e2daf044
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 841422 - Follow-up, move simple_phone_matcher test into sharedtest r=me

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https://hg.mozilla.org/integration/gaia-central/rev/4ec1ab75ec44
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #19046 from alivedise/bugzilla/1006750/activity-resize

Bug 1006750 - Dismiss keyboard early when activity requesting. r=timdream

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https://hg.mozilla.org/integration/gaia-central/rev/456f9576a919
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1006750 - Dismiss keyboard early when activity requesting.
Bumping manifests a=b2g-bump