Update kotlin-android-destination-filters.md

Added a note that 'Destination Filters' toggle should be turned on to enable the filters (Android Kotlin)

Author: longstoryshort

src/connections/sources/catalog/libraries/mobile/kotlin-android/kotlin-android-destination-filters.md

@@ -22,6 +22,7 @@ To get started with destination filters on mobile device-mode destinations using
   ```java
     analytics.add(DestinationFilters())
   ```
+3. Enable Destination Filters toggle in Segment workspace: navigate to the Android source, click "Settings" and select "Advanced".
 
 Use destination filters to prevent certain data from flowing into a destination. You can conditionally filter out event properties, traits, and fields, or even filter out the event itself.