am a9faa459: Merge "Change "Media output" to "Cast" for MR Button" into lmp-dev

    <!-- Description of a wireless display route. [CHAR LIMIT=50] -->

    <string name="wireless_display_route_description">Wireless display</string>

    <!-- Content description of a MediaRouteButton for accessibility support -->

    <string name="media_route_button_content_description">Media output</string>

    <!-- Content description of a MediaRouteButton for accessibility support.

        Cast is the standard android verb for sending content to a remote device. [CHAR LIMIT=50] -->

    <string name="media_route_button_content_description">Cast</string>

    <!-- Title of the media route chooser dialog. [CHAR LIMIT=40] -->

    <string name="media_route_chooser_title">Connect to device</string>