Google App Action Custom Intent is not working from Google Assistant - app-actions

Question

I'm trying to build App Actions using custom intent but there's not much help that I can get from the Google's document.
I am able to run the intent and catch the parameter using the App Action Test Tool but when I try to run the custom intent by using interacting directly with Google Assistant like: "Hey Google, open [app name] and [make a cake at 12:00:00]", the console said: "Sorry, I don't understand".
I've been trying to follow some documents and tutorials and have XML files as below.
If anyone has experience on this, please share it. Thank you in advance.
shortcuts.xml
<capability
android:name="custom.actions.intent.MY_CUSTOM_INTENT"
app:queryPatterns="#array/SampleQueries">
<intent
android:action="android.intent.action.VIEW"
android:targetPackage="com.example.appId"
android:targetClass="com.example.appId.MainActivity">
<parameter
android:name="time"
android:key="time"
android:mimeType="https://schema.org/Time" />
</intent>
</capability>
<shortcut
android:shortcutId="MY_CUSTOM_INTENT"
android:shortcutShortLabel="#string/MY_CUSTOM_INTENT">
<capability-binding android:key="custom.actions.intent.MY_CUSTOM_INTENT">
<parameter-binding
android:key="time"
android:value="#string/my_custom_intent"/>
</capability-binding>
</shortcut>
strings.xml
<string-array name="SampleQueries">
<item>make a cake at $time</item>
<item>make a cake</item>
</string-array>
<string name="my_custom_intent">my_custom_intent</string>
<string name="MY_CUSTOM_INTENT">MY_CUSTOM_INTENT</string>
Run custom intent of App Actions from Google assistant and catch all the parameters from the input.