Add Android User Feedback note about associatedEventId (#14238)

Author: stefanosiano

docs/platforms/android/user-feedback/index.mdx

@@ -64,7 +64,10 @@ The User Feedback widget integrates seamlessly with Session Replay. When the wid
 
 ## User Feedback API
 
-The User Feedback API allows you to collect user feedback while using your own UI components. You can submit feedback directly using the `Sentry.captureFeedback(Feedback)` method:
+The User Feedback API allows you to collect user feedback while using your own UI components. You can submit feedback directly using the `Sentry.captureFeedback(Feedback)` method.
+
+Sentry can optionally pair this feedback with an event, giving you additional insight into issues. Sentry needs the `eventId` to be able to associate the user feedback to the corresponding event. For example, to get the `eventId`, you can use <PlatformLink to="/configuration/options/#before-send">beforeSend</PlatformLink>, or the return value of the method capturing an event.
+
 
 ```java
 import io.sentry.Sentry;