Added new key codes from Android 4.4 (API 20) and 5.0 (API 21).

src/video/android/SDL_androidkeyboard.c

@@ -263,6 +263,43 @@ static SDL_Scancode Android_Keycodes[] = {
     SDL_SCANCODE_BRIGHTNESSDOWN, /* AKEYCODE_BRIGHTNESS_DOWN */
     SDL_SCANCODE_BRIGHTNESSUP, /* AKEYCODE_BRIGHTNESS_UP */
     SDL_SCANCODE_UNKNOWN, /* AKEYCODE_MEDIA_AUDIO_TRACK */
+    SDL_SCANCODE_SLEEP, /* AKEYCODE_SLEEP */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_WAKEUP */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_PAIRING */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_MEDIA_TOP_MENU */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_11 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_12 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_LAST_CHANNEL */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_DATA_SERVICE */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_VOICE_ASSIST */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_RADIO_SERVICE */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_TELETEXT */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_NUMBER_ENTRY */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_TERRESTRIAL_ANALOG */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_TERRESTRIAL_DIGITAL */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_SATELLITE */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_SATELLITE_BS */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_SATELLITE_CS */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_SATELLITE_SERVICE */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_NETWORK */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_ANTENNA_CABLE */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_HDMI_1 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_HDMI_2 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_HDMI_3 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_HDMI_4 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_COMPOSITE_1 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_COMPOSITE_2 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_COMPONENT_1 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_COMPONENT_2 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_INPUT_VGA_1 */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_AUDIO_DESCRIPTION */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_AUDIO_DESCRIPTION_MIX_UP */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_AUDIO_DESCRIPTION_MIX_DOWN */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_ZOOM_MODE */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_CONTENTS_MENU */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_MEDIA_CONTEXT_MENU */
+    SDL_SCANCODE_UNKNOWN, /* AKEYCODE_TV_TIMER_PROGRAMMING */
+    SDL_SCANCODE_HELP, /* AKEYCODE_HELP */
 };
 
 static SDL_Scancode