I use 2021.2.0b12.3482. Right after update it became unavailable to build an android version because of error. Notice that Assets/Plugins/Android/assets contains the same 2 files sa before. AAR files are also here.
```csharp
*Exception: OBSOLETE - Providing Android resources in Assets/Plugins/Android/assets was removed, 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.
UnityEditor.Android.PostProcessor.Tasks.CheckUserResources.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at :0)
UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context) (at :0)
UnityEditor.Android.PostProcessAndroidPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at :0)
UnityEditor.Android.AndroidBuildPostprocessor.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTarget target) (at :0)
UnityEditor.PostprocessBuildPlayer.PrepareForBuild (UnityEditor.BuildOptions options, UnityEditor.BuildTargetGroup targetGroup, UnityEditor.BuildTarget target) (at <8a8bf68eb0e443b196386a376561c6a1>:0)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr, Boolean&)
Error building Player: Exception: OBSOLETE - Providing Android resources in Assets/Plugins/Android/assets was removed, 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.*
```