Add exported property to the activity element

Source/Platforms/Android/Binaries/Project/app/src/main/AndroidManifest.xml

@@ -8,6 +8,7 @@
         android:extractNativeLibs="true"
         android:hasCode="true">
         <activity android:name="com.flaxengine.GameActivity"
+            android:exported="true"
             android:label="@string/app_name"
             android:configChanges="orientation|keyboardHidden|screenSize"
             android:screenOrientation="${DefaultOrientation}">