Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/0602502c66fa
Author: GaryChen, PYChen, Gary <mmm198219@gmail.com>
Desc: Merge pull request #24254 from msliu/bug-1070791-fix

Bug 1070791 - [camera] Face Detection box is not disappear without face ... r=justindarc.

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https://hg.mozilla.org/integration/gaia-central/rev/fbe0079e3837
Author: vincentliu <vliu@mozilla.com>
Desc: Bug 1070791 - [camera] Face Detection box is not disappear without face after taking a picture. r=justindarc

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https://hg.mozilla.org/integration/gaia-central/rev/be14cd7510cf
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #24534 from jrburke/bug1074432-email-nomail-loadmore

Bug 1074432 - [email] display of unsynced folder has overlapping messages r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/63e3cbde89dc
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1074432 - [email] display of unsynced folder has overlapping messages

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https://hg.mozilla.org/integration/gaia-central/rev/a5d2ad3a9cf1
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #24417 from crh0716/1064463

Bug 1064463 - Do not set caller id explicitly when users preference is not available r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/3ba8922ca843
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1064463 - Do not set caller id explicitly when users preference is not available
Bumping manifests a=b2g-bump