I want to stop showing ads in sideloaded apks. In one stack overflow answer I found that installer packagename can change in the future. Any way?

I want to stop showing ads if the apk is sideloaded version i.e. if it is not installed from play store. So I did this by:

String installer = getPackageManager().getInstallerPackageName(
    "com.example.myapp");

if (installer == null) {
    // app was illegally downloaded from unknown source. 
    // dear user, please re-install it from market
} 
else if(installer.equals("com.android.vending") {
    // app was installed legally
    
}

Now in one stack overflow answer (link): https://stackoverflow.com/a/36299631/12182265

I found that: The installer packagename can change in the future. For example, the installer package name use to be "com.google.android.feedback" (see here) and now it is "com.android.vending".

So I did some search and I found:

GooglePlayServicesUtilLight.GOOGLE_PLAY_STORE_PACKAGE

constant.

So instead of checking hardcoding value i.e. "com.android.vending" can I use GooglePlayServicesUtilLight.GOOGLE_PLAY_STORE_PACKAGE? Will below code work?

String installer = getPackageManager().getInstallerPackageName(
"com.example.myapp");

if (installer == null) {
    // app was illegally downloaded from unknown source. 
    // dear user, please re-install it from market
} 
else if(installer.equals(GooglePlayServicesUtilLight.GOOGLE_PLAY_STORE_PACKAGE)) {
    // app was installed legally

}

Why I don't want to show ads in sideloaded apk?

Answer: Currently I have app on play store which I made not available in 10 countries. So I have doubt that there ares some users from those 10 countries who installed sideloaded version of it from third party sites which I cannot control. And they clicked on banner ads in my app which resulted ad serving limit placed on my admob account. Am I correct? Or sideloading will not be the cause of ad serving limit?