Adjust assist disclosure stroke width to spec

Bug: 21568059
Change-Id: Ib1ddb8890715b98d36ed5827f053970a9d4a7173

Author: XSJoJo

packages/SystemUI/res/values/dimens.xml

@@ -583,7 +583,7 @@
     <dimen name="managed_profile_toast_padding">4dp</dimen>
 
     <!-- Thickness of the assist disclosure beams -->
-    <dimen name="assist_disclosure_thickness">3dp</dimen>
+    <dimen name="assist_disclosure_thickness">2.5dp</dimen>
 
     <!-- Thickness of the shadows of the assist disclosure beams -->
     <dimen name="assist_disclosure_shadow_thickness">1.5dp</dimen>