Merge "Add strings for "Show key presses" developer option" into udc-qpr-dev

    <!-- UI debug setting: show touches location summary [CHAR LIMIT=50] -->

    <string name="show_touches_summary">Show visual feedback for taps</string>

    <!-- UI debug setting: show key presses? [CHAR LIMIT=25] -->

    <string name="show_key_presses">Show key presses</string>

    <!-- UI debug setting: show physical key presses summary [CHAR LIMIT=50] -->

    <string name="show_key_presses_summary">Show visual feedback for physical key presses</string>

    <!-- UI debug setting: show where surface updates happen? [CHAR LIMIT=25] -->

    <string name="show_screen_updates">Show surface updates</string>

    <!-- UI debug setting: show surface updates summary [CHAR LIMIT=50] -->