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

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https://hg.mozilla.org/integration/gaia-central/rev/da2401e07938
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #16358 from EragonJ/bug-971565

Bug 971565 - [System2] Instantiable Title

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https://hg.mozilla.org/integration/gaia-central/rev/59670ffd3a41
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 971565 - [System2] Instantiable Title

- update test
- update bootstrap.js
- add necessary mock for bootstrap_test.js
Bumping manifests a=b2g-bump