We are working on Print service(plugin) related application, we have a production version which is available on Google Play. We planned to release an updated version of this app with the new app icon(launcher icon). We replaced existing res/drawable/ic_launcher.png with a newer icon with a different name like res/drawable/ic_new_launcher.png. So to see the updated new logo, We have to navigate Android Device setting -> Printing. It is showing me the Android logo instead of Our app logo. We can see app icon only if we restart device & coming back to Printing service screen under device setting. We tried to move ic_new_launcher.png from drawable to mipmap but still facing the same issue.
Issue observed on Samsung Galaxy S8 plus(7.0 Nougat) & LG G6(7.0 Nougat). Not sure this issue resides on other device models & OS version.
Note: *App logo is showing perfectly if we install freshly Attached Image for reference
Please let me know If any other information required.

Add your launcher icon in all below res folder i hope its help
1)mipmap-hdpi
2)mipmap-mdpi
3)mipmap-xhdpi
4)mipmap-xxhdpi
5)mipmap-xxxhdpi