align tab's infinity symbol (#6073)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/1208671518894266/task/1210248310047057?focus=true

### Description
Move the infinity symbol on the tab icon one pixel to the right and one
pixel up (on my device).

Author: LukasPaczos

app/src/main/res/layout/view_experimental_tab_switcher_button.xml

@@ -58,8 +58,8 @@
         android:id="@+id/tabCountInfinite"
         android:layout_width="24dp"
         android:layout_height="24dp"
-        android:layout_marginStart="11.75dp"
-        android:layout_marginTop="6.5dp"
+        android:layout_marginStart="12dp"
+        android:layout_marginTop="6dp"
         android:fontFamily="sans-serif-condensed"
         android:gravity="center"
         android:text="∞"