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

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https://hg.mozilla.org/integration/gaia-2_0/rev/32fd183458d1
Author: AndreiH <andrei.hutusoru@softvision.ro>
Desc: Merge pull request #21803 from AndreiH/test_mmi_v2.0

Bug 1020166 - Update IMEI tests to handle 1 and 2 IMEIs

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https://hg.mozilla.org/integration/gaia-2_0/rev/f85a299d0578
Author: Andrei Hutusoru <andreihutusoru@P5069.(none)>
Desc: Bug 1020166 - Update IMEI tests to handle 1 and 2 IMEIs

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https://hg.mozilla.org/integration/gaia-2_0/rev/0fc8bd73284b
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Merge pull request #21799 from gmarty/Bug-1038722-v2.0

Bug 1038722 - Fix notification integration tests, a=test only

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https://hg.mozilla.org/integration/gaia-2_0/rev/0157c62796ae
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1038722 - Fix notification integration tests
Bumping manifests a=b2g-bump