Manifest permission for Main activity in Android

I need some help in mentioning android:permission for the Main activity that contains intent filters like,
intent-filter
action android:name=“android.intent.action.MAIN”
category android:name=“android.intent.category.LAUNCHER”
intent-filter
intent-filter
action android:name=“android.intent.action.VIEW”
category android:name=“android.intent.category.DEFAULT”
category android:name=“android.intent.category.BROWSABLE”
intent-filter

I am mentioning android:exported as true since this is the Main and only activity in my android application.
But in the pen test it is complaining about need to set permission for Main activity in android,

Application Id.MainActivity
Permission: null

So I need help on how to set permission for this main activity whether I tried to setup custom permission but it throws error as Permission Denial.