RoomDirectory : set default value of FeatureFlag to false.

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -93,7 +93,7 @@ enum class FeatureFlags(
         key = "feature.roomdirectorysearch",
         title = "Room directory search",
         description = "Allow user to search for public rooms in their homeserver",
-        defaultValue = true,
+        defaultValue = false,
         isFinished = false,
     )
 }