Applied Material design rules to calculate drawer width

Bug: 27437727
Change-Id: I2f634815d5e534053e0ed7a66631df9bddf32bd5
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 9fc8a73..5af7da3 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -37,4 +37,5 @@
     <dimen name="dir_elevation">8dp</dimen>
     <dimen name="drag_shadow_size">120dp</dimen>
     <dimen name="grid_item_elevation">2dp</dimen>
+    <dimen name="max_drawer_width">280dp</dimen>
 </resources>