Use SP for folder text size.

Bug: 156141463
Test: change font size, verify folder text size changes
Change-Id: I7e479d76c9f16c5b42cabfbae63494ef98b6dc27
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 7c00362..7ae729a 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -465,9 +465,14 @@
         return (int) (dp * Resources.getSystem().getDisplayMetrics().density);
     }
 
+
     public static int pxFromSp(float size, DisplayMetrics metrics) {
-        return (int) Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
-                size, metrics));
+        return pxFromSp(size, metrics, 1f);
+    }
+
+    public static int pxFromSp(float size, DisplayMetrics metrics, float scale) {
+        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
+                size, metrics) * scale);
     }
 
     public static String createDbSelectionQuery(String columnName, IntArray values) {