readd build step

Author: abueide

devbox.json

@@ -31,12 +31,14 @@
         "yarn install",
         "yarn e2e install",
         "yarn e2e pods",
+        "yarn e2e build:ios",
         "yarn e2e test:ios"
       ],
 
       "test-android": [
         "yarn install",
         "yarn e2e install",
+        "yarn e2e build:android",
         "yarn e2e test:android"
       ]
     }