Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/955f4c05b9ce
Author: Luke Chang <lchang@mozilla.com>
Desc: Merge pull request #25569 from weilonge/1090134_Stingray

Add tv_apps path for test-agent to monitor any changes of test cases, r=@RickyChien

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https://hg.mozilla.org/integration/gaia-central/rev/c23f8f8a1219
Author: Sean Lee <weilonge@gmail.com>
Desc: Add tv_apps path for test-agent to monitor any changes of test cases.
Bumping manifests a=b2g-bump