Split touchscreen configuration into separate delegate

Touchscreen configuration shouldn't be as tightly coupled with display
configuration. In order to simplify the refactoring of OutputConfigurator &
display configuration, I'm breaking down the OutputConfigurator::Delegate into
smaller delegates that focus on more specific tasks. This should allow us to
refactor each component separately and in smaller chunks.

BUG=333413

Review URL: https://codereview.chromium.org/150403004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249019 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249019