Add support for color input datalist on Android

We pass the list of suggestions when opening the color chooser.
We also pass the suggestion labels but we aren't using them yet. We should use them in the future to improve accessibility.

The suggestions are arranged in a grid with four columns.

BUG=242455
NOTRY=true

Review URL: https://codereview.chromium.org/23026006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237890 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237890