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

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https://hg.mozilla.org/integration/gaia-central/rev/3020523f9c74
Author: Min-Zhong "John" Lu <jlu@mozilla.com>
Desc: Merge pull request #22819 from mnjul/bug_1024298_full_kb_panel_for_number_input

Bug 1024298 - [Keyboard UX update] Show the full symbol panel for type="number". r=timdream, f=rudyl, f=yurenju

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https://hg.mozilla.org/integration/gaia-central/rev/ca2421396500
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1024298 - [Keyboard UX update] Show the full symbol panel for type="number"

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https://hg.mozilla.org/integration/gaia-central/rev/71b6c350375e
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #22787 from viorelaioia/bug_1052473

Bug 1052473 - Fix failure in test_setup_and_send_imap_email.py

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https://hg.mozilla.org/integration/gaia-central/rev/2b7f17a4cbd5
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1052473 - Fix failure in test_setup_and_send_imap_email.py
Bumping manifests a=b2g-bump