[Lib] Skill Middleware update to clear conv state when skill is cancelled (#2441)

* Added fix to clear conversatoin state when skill is cancelled.

* Refactor Samples directories (#2437)

* Move analytics to /docs/assets and update the Power BI doc with a download button

* Move Android apps to /android/clients
Deprecate the csharp simple speech app (replacing with kona client)
Deprecrate the typescript webchat

* Refactors assistants to
/samples/csharp/assistants/EnterpriseAssistant.sln
/samples/charp/assistants/HospitalityAssistant.sln

Added build.props and .ruleset files to both

* Move all csharp clients to a single solution.
Rename assistant-ConsoleDirectLineSample to DirectLine.Web
Rename assistant-WebTest to WebChatWithLinkedAccounts.Web
Add. build.props and .ruleset

* Update README.md

* Refactor Skill directories (#2435)

* Skills:
Remove src directory
Move all tests to /skills/csharp/tests
Rename all test projects as {SkillName}Tests
Move Phone & Automotive Skill projects at same level as other experimentals

* Update test namespaces to {Skill}.Tests
Update TestBases to {Skill}TestBase

* Fix ruleset reference

* Reorder usings

* Fix tabe spacings

* Rename tests directories to match project names

* Refactor Libraries directories to SDK format (#2436)

* Rename /libs to /libraries to match SDK
Rename libraries solution to Microsoft.Bot.Builder.Solutions
Extract test projects to /tests directories

* Fix .snk file references

* Update to:
\sdk
    \csharp
        \build
        \libraries
            \microsoft.bot.builder.skills
            \microsoft.bot.builder.solutions
        \tests
            \microsoft.bot.builder.skills.tests
            \microsoft.bot.builder.solutions.tests
        Microsoft.Bot.Builder.Solutions.sln

* Rename microsoft.bot.builder.skills to microsoft.bot.builder.solutions.skills
Refactor typescript libraries to follow
\sdk
    \typescript
        \libraries
            \botbuilder-skills
            \botbuilder-solutions

Move .ps1 files to \build and update references within
Update yaml files with new references (csharp and typescript)
Remove VirtualAssistant.ruleset at root

* Updated npm pack references from \build\outputpackages directory

* Fix reference to Skills project in solution
Rename Skills test folder to Microsoft.Bot.Builder.Solutions.Skills.Tests

* Match botbuilder.solutions.skills.yml to new directory

* Remove .snk file from /build directory as it is duplicated in /sdk/csharp/build

* Move \yaml as subdirectory under \build

* Fix ref to microsoft.bot.builder.solutions.skills directory

* skill fixes (#2449)

* POI: align tests to code, update lu
* Bing search: add locale to GetSearchResult, update lu

* Added fix to clear conversatoin state when skill is cancelled.

* changed to clear conv state instead of delete

Author: lauren-mills

sdk/csharp/libraries/microsoft.bot.builder.solutions.skills/SkillMiddleware.cs

@@ -29,15 +29,9 @@ public SkillMiddleware(UserState userState, ConversationState conversationState,
             {
                 if (activity.Name == SkillEvents.CancelAllSkillDialogsEventName)
                 {
-                    // when skill receives a CancelAllSkillDialogsEvent, clear the dialog stack and short-circuit
-                    var currentConversation = await _dialogState.GetAsync(turnContext, () => new DialogState());
-					if (currentConversation.DialogStack != null)
-					{
-						currentConversation.DialogStack.Clear();
-						await _dialogState.SetAsync(turnContext, currentConversation);
-						await _conversationState.SaveChangesAsync(turnContext, true);
-					}
-
+                    await _dialogState.DeleteAsync(turnContext).ConfigureAwait(false);
+                    await _conversationState.ClearStateAsync(turnContext).ConfigureAwait(false);
+                    await _conversationState.SaveChangesAsync(turnContext, force: true).ConfigureAwait(false);
                     return;
                 }
             }