Fix Snackbar action button padding

Two issues here, the first is that we're using
Widget.AppCompat.Button.Borderless which has a parent
which sets a 88dp minWidth.

The second issue is that we don't need to set explicit
padding on the button since it already has the correct
values from its background drawable.

BUG: 30060349

Change-Id: I83ea90170f7785a6c866c6c3d8785c9d8929e14b
diff --git a/design/res/layout/design_layout_snackbar_include.xml b/design/res/layout/design_layout_snackbar_include.xml
index 1aab24b..14620d3 100644
--- a/design/res/layout/design_layout_snackbar_include.xml
+++ b/design/res/layout/design_layout_snackbar_include.xml
@@ -39,10 +39,7 @@
             android:layout_marginLeft="@dimen/design_snackbar_extra_spacing_horizontal"
             android:layout_marginStart="@dimen/design_snackbar_extra_spacing_horizontal"
             android:layout_gravity="center_vertical|right|end"
-            android:paddingTop="@dimen/design_snackbar_padding_vertical"
-            android:paddingBottom="@dimen/design_snackbar_padding_vertical"
-            android:paddingLeft="@dimen/design_snackbar_padding_horizontal"
-            android:paddingRight="@dimen/design_snackbar_padding_horizontal"
+            android:minWidth="48dp"
             android:visibility="gone"
             android:textColor="?attr/colorAccent"
             style="?attr/borderlessButtonStyle"/>