Fix breadcrumbs (#54)

* Update and rename toc.yml to toc.yml

* Update breadcrumb path and uhfHeaderId

* Update breadcrumb path

Author: raprice

docs/Mono.Android/en/XamarinAndroidAPI-breadcrumb/toc.yml

@@ -0,0 +1,7 @@
+- name: Xamarin
+  tocHref: /dotnet/
+  topicHref: /xamarin/index
+  items:
+  - name: .NET API browser
+    tocHref: /dotnet/
+    topicHref: /dotnet/api/index

docs/Mono.Android/en/breadcrumb/toc.yml

@@ -43,13 +43,13 @@
          "ms.subservice": "xamarin-android",
          "ms.service": "xamarin",
         "apiPlatform": "dotnet",
-        "breadcrumb_path": "~/breadcrumb/toc.yml",
+        "breadcrumb_path": "/dotnet/XamarinAndroidAPI-breadcrumb/toc.json",
         "author": "dotnet-bot",
         "ms.author": "dotnetcontent",
         "manager": "crdun",
         "ms.date": "02/08/2019",
         "searchScope": ["Xamarin.Android API"],
-        "uhfHeaderId": "MSDocsHeader-DotNet",
+        "uhfHeaderId": "MSDocsHeader-Xamarin",
         "ms.topic": "managed-reference",
         "products": ["https://authoring-docs-microsoft.poolparty.biz/devrel/f0c462af-0ef9-4821-b36f-ba3d94736e2b"],
         "defaultDevLang": "csharp"