Fixed the reference to the compat version of the widget. Revised the class description.

Cherry-picked from CL 19211934 merged on master. See https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/19211934.

Test: Built API documentation
Change-Id: If74178eba609346eb7cf9e462bdb3edf40db4d81
1 file changed