Troubleshooting docs structure refactored

Summary: Troubleshooting docs structure refactored. This should fix publishing of docs on GitHub which is currently failing, because of link to fb-only page from public page: https://github.com/facebook/flipper/actions/runs/2351680003.

Reviewed By: passy

Differential Revision: D36513180

fbshipit-source-id: c0339d437f560464e771e46dfc0a55782faf6a54

docs/getting-started/troubleshooting/android.mdx

@@ -2,11 +2,30 @@
 id: android
 title: Troubleshooting Android Issues
 sidebar_label: Android Issues
-custom_edit_url: https://www.internalfb.com/intern/diffusion/FBS/browsefile/master/xplat/sonar/docs/android.mdx
+custom_edit_url: https://www.internalfb.com/intern/diffusion/FBS/browsefile/master/xplat/sonar/docs/getting-started/troubleshooting/android.mdx
 ---
 
+import InternalAndroid from './fb/_android.mdx';
+
 Flipper is a work in progress and issues may occur. This page contains known issues associated with the Android platform and provides steps you can take to try to resolve them.
 
+<InternalAndroid />
+
+<OssOnly>
+
+## In-app diagnostics
+The Flipper SDK includes an in-app connection diagnostics screen to help you diagnose problems.
+
+Replace `<APP_PACKAGE>` below with the package name of your app, for example, such as `com.facebook.flipper.sample`.
+
+On a terminal, run the following:
+
+```bash
+adb shell am start -n <APP_PACKAGE>/com.facebook.flipper.android.diagnostics.FlipperDiagnosticActivity
+```
+
+This will only work if you added `FlipperDiagnosticActivity` to your `AndroidManifest.xml`. See [getting started](./getting-started/android-native.mdx#diagnostics) for help.
+
 ## Exception from call site #4 bootstrap method
 
 Build error after including the Flipper dependency:
@@ -61,3 +80,5 @@ implementation("com.facebook.react:react-native:+") {
     exclude group:'com.facebook.fbjni'
 }
 ```
+
+</OssOnly>