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

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https://hg.mozilla.org/integration/gaia-central/rev/aca0434d253d
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #24371 from jmcanterafonseca/ice_shortcut

Bug 1071634 - ICE Contacts Group Shortcut seems to be visually incorrect

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https://hg.mozilla.org/integration/gaia-central/rev/67ea5f04e52a
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1071634 - ICE Contacts Group Shortcut seems to be visually incorrect

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https://hg.mozilla.org/integration/gaia-central/rev/538b1adcbd18
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #24415 from RudyLu/keyboard/Bug1069521-keyboard_settings

Bug 1069521 - Refine Keyboard settings style.
r=timdream.

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https://hg.mozilla.org/integration/gaia-central/rev/b9131e08e90e
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1069521 - Refine Keyboard settings style.
 - Change the status bar color to sync with settings app.
 - Modify the title to "built-in keyboard".
Bumping manifests a=b2g-bump