Decreases screen saver margin on sw600dp

BUG: 8891058

At 3x density and with the previous margins,
desk_clock_time_data.xml was too large to
fit in portrait on the Flo.

Change-Id: Idcf7843b3fa7bccabde6b1b389e500cef03411fa
diff --git a/res/values-sw600dp/dimens.xml b/res/values-sw600dp/dimens.xml
index d14e6c6..a986c41 100644
--- a/res/values-sw600dp/dimens.xml
+++ b/res/values-sw600dp/dimens.xml
@@ -29,7 +29,7 @@
     <dimen name="time_margin_bottom">14dip</dimen>
     <dimen name="time_margin_top">48dip</dimen>
     <dimen name="digital_margin_bottom">36dip</dimen>
-    <dimen name="screensaver_margin">32dip</dimen>
+    <dimen name="screensaver_margin">20dip</dimen>
     <dimen name="ampm_margin_top">15dip</dimen>
     <dimen name="font_margin_adjust">8dip</dimen>
     <dimen name="next_alarm_margin_top">-5dip</dimen>