Use default gateway on error if no gateway is recorded yet

Author: p1gp1g

libraries/pushproviders/unifiedpush/src/main/kotlin/io/element/android/libraries/pushproviders/unifiedpush/UnifiedPushGatewayUrlResolver.kt

@@ -28,8 +28,9 @@ class DefaultUnifiedPushGatewayUrlResolver(
     ): String {
         return when (gatewayResult) {
             is UnifiedPushGatewayResolverResult.Error -> {
-                // Use previous gateway if any, or the provided one
-                unifiedPushStore.getPushGateway(instance) ?: gatewayResult.gateway
+                // Use previous gateway if any, or the default one
+                unifiedPushStore.getPushGateway(instance)
+                    ?: defaultPushGatewayHttpUrlProvider.provide()
             }
             UnifiedPushGatewayResolverResult.ErrorInvalidUrl,
             UnifiedPushGatewayResolverResult.NoMatrixGateway -> {