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

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https://hg.mozilla.org/integration/gaia-central/rev/8974079e1168
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #23068 from viorelaioia/bug_1055951

Bug 1055951 - [Flame][v2.1] test_settings_wifi.py :: Element cannot be f...

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https://hg.mozilla.org/integration/gaia-central/rev/7dbf664df58e
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 1055951 - [Flame][v2.1] test_settings_wifi.py :: Element cannot be found and cannot connect to specific network failed

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https://hg.mozilla.org/integration/gaia-central/rev/38a3ade25fde
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #23016 from gasolin/issue-973449

Bug 973449 - [settings] refactor Do not track panel with AMD pattern, r=eragon

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https://hg.mozilla.org/integration/gaia-central/rev/77681751a267
Author: gasolin <gasolin@gmail.com>
Desc: Bug 973449 - [settings] refactor Do not track panel with AMD pattern
Bumping manifests a=b2g-bump