Fix Overlay e2e

The button which was added for `setRoot should not remove overlay` wasn’t fully visible on Android
and Detox detected it as not visible.

playground/src/screens/CustomDialog.js

     backgroundColor: 'green',
     justifyContent: 'center',
     alignItems: 'center',
-    height: 100,
+    height: 140,
     bottom: 0,
     position: 'absolute',
     left: 0,