Update troubleshooting.mdx (#2681)

When I implemented a subscription system on my app, I tried for a week
to find why my payments always got refused inside my app, because i
could not find anything wrong with my source code. Until i realize there
was a hold on my payment profile, meaning google play by default will
refuses any payment attempt, even for test environments.

I figure out this issue could be one that can frustrate a lot of people,
and it's not the lib fault.

docs/docs/guides/troubleshooting.mdx

@@ -16,6 +16,7 @@ Most of the issues encountered by users are caused by:
 
 - A device simulator. Use a real device for testing!
 - An incorrect usage of the library. Read the [documentation](https://react-native-iap.dooboolab.com).
+- For `Android`, a hold in your payment profile on Google Play Console. Check for any warnings.
 
 ## `getProducts` returns an empty array