Uses ResourceLoader's virtual config feature to get the config and pass
it down to Wvui's typeahead search component.
Disclaimer: I'm a typescript noob and am not sure if the
config.json.d.ts is correct although it seems to make tsc happy.
Bug: T260167
Change-Id: I2eced14c7df3b795b4de0e5149c2ca9fd598c7be
