am 0ba7b925: am 680ee91f: am 95d9bfd1: Clear voice search mode when changing search engines.

Merge commit '0ba7b925618a9e6e7e6f601119b9849527d9ee39'

* commit '0ba7b925618a9e6e7e6f601119b9849527d9ee39':
  Clear voice search mode when changing search engines.