[WIP] Adding Espresso test for orientation change (#2814)

* first commit

* initial commit

* added UI test for more activities

* added more tests

* improved code quality

* reverted code

app/src/androidTest/java/fr/free/nrw/commons/WelcomeActivityTest.kt

@@ -98,4 +98,9 @@ class WelcomeActivityTest {
                     assert(activityRule.activity.isDestroyed)
                 }}
     }
+
+    @Test
+    fun orientationChange() {
+        UITestHelper.changeOrientation(activityRule)
+    }
 }