Adding 400dpi support to emulator.

Change-Id: I7d04988e539f29028b86ba6c4daae5bae3be9543
diff --git a/android/hw-lcd.c b/android/hw-lcd.c
index 301e4a3..5b5d4e7 100644
--- a/android/hw-lcd.c
+++ b/android/hw-lcd.c
@@ -29,8 +29,10 @@
             density = LCD_DENSITY_MDPI;
         else if (density < (LCD_DENSITY_HDPI + LCD_DENSITY_XHDPI)/2)
             density = LCD_DENSITY_HDPI;
-        else if (density < (LCD_DENSITY_XHDPI + LCD_DENSITY_XXHDPI)/2)
+        else if (density < (LCD_DENSITY_XHDPI + LCD_DENSITY_400DPI)/2)
             density = LCD_DENSITY_XHDPI;
+        else if (density < (LCD_DENSITY_400DPI + LCD_DENSITY_XXHDPI)/2)
+            density = LCD_DENSITY_400DPI;
         else if (density < (LCD_DENSITY_XXHDPI + LCD_DENSITY_XXXHDPI)/2)
             density = LCD_DENSITY_XXHDPI;
         else