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

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https://hg.mozilla.org/integration/gaia-central/rev/44ac781f7a36
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #19344 from tauzen/Bug1004977

Bug 1004977 - [NFC] NDEF TNF Unknown, Unchanged, Reserved handling in NfcManager, r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/4aa7b5f982cb
Author: Krzysztof Mioduszewski <kmioduszewski@gmail.com>
Desc: Bug 1004977 - [NFC] NDEF TNF Unknown, Unchanged, Reserved handling in NfcManager
Bumping manifests a=b2g-bump