Fix issue #16537318: clarify voice interaction strings.

         a voice interaction or recognition service to use. -->

    <string name="voice_service_preference_section_title">Voice input services</string>

    <!-- [CHAR LIMIT=NONE] The summary text for the voice service preference that is

         a full voice interaction service. -->

         a full voice interaction service.  This is something that provides interactive

         voice control of applications; for example you can tell it commands to have it

         launch and let you interact with applications through your voice. -->

    <string name="voice_interactor_preference_summary">Full voice interaction</string>

    <!-- [CHAR LIMIT=NONE] The summary text for the voice service preference that is

         a simple voice recognition service. -->

         a simple voice recognition service.  This is something that only provides simple

         speech to text conversions that applications can use when they want to allow you

         to provide text to them through your voice (instead of with a keyboard). -->

    <string name="voice_recognizer_preference_summary">Simple voice recognition</string>

    <!-- [CHAR_LIMIT=NONE] Warning message about security implications of enabling a

         voice interaction service, displayed as a dialog