What causes the OBSOLETE - Providing Android resources... warning?

Question

Unity

About a month ago I compiled the game and uploaded it to Google, so I decided to make some visual changes there (changed a couple of pictures), and compiled it, I was given this warning

OBSOLETE - Providing Android resources in Assets/Plugins/Android/res is deprecated, please move your resources to an AAR or an Android Library. See "AAR plug-ins and Android Libraries" section of the Manual for more details.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

I rummaged through the net and didn’t understand how to fix it, they say you need to create a separate plugin and put it there or something like that, I didn’t understand how to do it ...
As a result, I have a question - how to do it and is it necessary?

Yes, and I also decided to check it right away on my phone and created an apk file, for some reason I have it called

My Game_UnityEngine.GUIUtility_ProcessEvent (int,intptr,bool&)_.arm64-v8a.apk

Where does this "_UnityEngine.GUIUtility_ProcessEvent (int,intptr,bool&)_" come from... there is no such thing in the name...
The name under the label on the phone is also the same.