Resume only if there is no active call

app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt

@@ -1540,6 +1540,7 @@ private fun CallRow(
                         onClick = {
                             val connection = ConnectionService.connections[call.callp]
                             if (call.onhold) {
+                                if (!Call.isAnyCallActive(ctx)) {
                                     Log.d(
                                         TAG,
                                         "AoR ${call.ua.account.aor} resuming call ${call.callp} with ${call.callUri.value}"
@@ -1548,7 +1549,9 @@ private fun CallRow(
                                         connection.onUnhold()
                                     else
                                         call.resume()
-                            } else {
+                                }
+                            }
+                            else {
                                 Log.d(
                                     TAG,
                                     "AoR ${call.ua.account.aor} holding call ${call.callp} with ${call.callUri.value}"