Fix RenderScript leaks; set a reasonable default value for PREF_TEXT_CLOCK_SIZE.

app/src/main/java/com/tommasoberlose/anotherwidget/helpers/ImageHelper.kt

@@ -73,6 +73,9 @@ object ImageHelper {
 
         allocationIn.destroy()
         allocationOut.destroy()
+        colorMatrixScript.destroy()
+        blurScript.destroy()
+        //rs.destroy()
 
         return bitmap
     }