Add a hook to disable public rooms/spaces on UI.

features/enterprise/api/src/main/kotlin/io/element/android/features/enterprise/api/SessionEnterpriseService.kt

@@ -29,4 +29,10 @@ interface SessionEnterpriseService {
 
     /** Whether the homeserver forbids creating encrypted rooms, in which case the app must not offer the option. */
     suspend fun isEncryptionDisabledByHomeserver(): Boolean
+
+    /**
+     * Whether the homeserver forbids public rooms and spaces, in which case the app must not offer to create one,
+     * nor to make an existing room or space public.
+     */
+    suspend fun arePublicRoomsDisabledByHomeserver(): Boolean
 }