Currently the only option we have about the ad validator, is if we want to disable it, as it's annoying to see it right on top of the UI:
Meaning this in manifest:
<meta-data
android:name="com.google.android.gms.ads.flag.NATIVE_AD_DEBUGGER_ENABLED"
android:value="false" />
Please have more APIs for this.
The most basic one would probably be to add a callback to be called when it got a message for us, of success/failure.