Merge "Add accessibility hooks for Preference, provide a11y header info" into nyc-dev am: cb26d0e1ce
am: 5f4f414f9b

* commit '5f4f414f9beb9ccde802bb9f8b49ca2f9fe1c592':
  Add accessibility hooks for Preference, provide a11y header info

Change-Id: If697b2eef857b8bfd52122c254beec164cc1038e