Error building android using a custom editor package

I have created an editor custom package which builds a project to android. This package only contains:

Assets/Editor/BuildAssembly.Editor.asmdef
Assets/Editor/CustomBuild.cs
Assets/Editor/MyCustomBuildProcessor.cs


BuildAssembly.Editor.asmdef:

Code (JavaScript):

1.  
2. {
3.     "name": "BuildAssembly.Editor",
4.     "references": [],
5.     "optionalUnityReferences": [],
6.     "includePlatforms": [
7.         "Editor"
8.     ],
9.     "excludePlatforms": [],
10.     "allowUnsafeCode": false,
11.     "overrideReferences": false,
12.     "precompiledReferences": [],
13.     "autoReferenced": true,
14.     "defineConstraints": []
15. }

CustomBuild.cs

Code (CSharp):

1.        
2. public static void BuildAndroid()
3.         {
4.             ...........................
5.             BuildPlayerOptions buildPlayerOptions = new BuildPlayerOptions();
6.             buildPlayerOptions.scenes = collectBuildScenes();
7.             buildPlayerOptions.locationPathName = filename;
8.             buildPlayerOptions.target = BuildTarget.Android;
9.             buildPlayerOptions.options = BuildOptions.None | BuildOptions.ShowBuiltPlayer;
10.             BuildPipeline.BuildPlayer(buildPlayerOptions);
11.            ......................
12.         }

In other hand, I have another project that uses BuildAndroid method in this way:

Code (CSharp):

1.      
2.     [MenuItem("Project Tools/Build/Android")]
3.     public static void BuildAndroid()
4.     {
5.         Custom.Build.Editor.CustomBuild.BuildAndroid();
6.     }
7.  

Every time I click on that button I get this error:

ArgumentException: The Assembly UnityEditor is referenced by BuildAssembly.Editor ('Packages/com.custom.build/Library/ScriptAssemblies/BuildAssembly.Editor.dll'). But the dll is not allowed to be included or could not be found.
UnityEditor.AssemblyHelper.AddReferencedAssembliesRecurse (System.String assemblyPath, System.Collections.Generic.List`1 alreadyFoundAssemblies, System.String[] allAssemblyPaths, System.String[] foldersToSearch, System.Collections.Generic.Dictionary`2 cache, BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:155)
UnityEditor.AssemblyHelper.FindAssembliesReferencedBy (System.String[] paths, System.String[] foldersToSearch, BuildTarget target) (at C:/buildslave/unity/build/Editor/Mono/AssemblyHelper.cs:195)
UnityEditor.BuildPipeline:BuildPlayer(BuildPlayerOptions)
Custom.Build.Editor.CustomBuild:BuildAndroid() (at D:/Roberto/Coding/UnityPackages/Build/Assets/Editor/CustomBuild.cs:45)
ProjectToolMenu:BuildAndroid() (at Assets/Editor/ProjectToolMenu.cs:8)


It looks like unity is adding my custom package (BuildAssembly.Editor) in production build which it shouldn´t happen as that package is marked
as "includePlatforms": ["Editor"]

I am not sure if I am missing something. I also noticed that every time I changed anything in the cs from my custom package,
I will have to delete library folder and reimport all otherwise I will get this error: error CS1704: An assembly with the same name `BuildAssembly.Editor' has already been imported. Consider removing one of the references or sign the assembly


Unity version: 2018.2.14f1

Project: https://drive.google.com/file/d/1tq2Dye7h-qASpupS8hf29GRHu8OSWCJO/view?usp=sharing