ExtractTypeDeclarationToNewFile not work for multi targetFrameworks project

**Product and Version Used**:
2.2.0+VS2019 16.4.0Preview1

**Steps to Reproduce**:
1. Create an csproj(`ClassLibrary2`) in VS, and modify to multi targetFrameworks
```xml

netstandard2.0;net472

```
2. Create `Class1.cs` at `ClassLibrary2/NewFolder/Class1.cs`;
3. Add another class `Class2` in the file;
```cs
namespace ClassLibrary2.NewFolder
{
public class Class1
{
}
public class Class2
{
}
}
```
4. Call quick action at `Class2`, and choose `Extract 'Class2' to a new file`

**Actual Behavior**:
`Class2.cs` should be created at `ClassLibrary2/NewFolder/Class2.cs`

**Expected Behavior**:
`Class2.cs` be created at `ClassLibrary2/ClassLibrary2 (netstandard2.0)/NewFolder/Class2.cs`

Start by reproducing the Extract 'Class2' to a new file quick action in the multi-target ClassLibrary2 project described, using Class1.cs and the Class2 declaration. Trace where the action chooses the output path; done means Class2.cs is created under the expected target-framework directory for the multi-target project.

Written by the indexing model from the issue text.