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

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https://hg.mozilla.org/integration/gaia-central/rev/562a515a6a1c
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #20548 from RudyLu/settings/Bug1024695-waitFor_keyboard_settings_frame

Bug 1024695 - Intermittent keyboard_settings_test.js |
r=evanxd.

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https://hg.mozilla.org/integration/gaia-central/rev/73333bd3c694
Author: Rudy Lu <me@rudy.lu>
Desc:  Bug 1024695 - Intermittent keyboard_settings_test.js |
 manipulate keyboard settings Launch built-in keyboard's settings page
  - Add waiting logic in switchToApp function when switching to keyboard
    app settings page.
Bumping manifests a=b2g-bump