UI: Add AMD AV1 encoder to simple output mode

Fixes https://github.com/obsproject/obs-studio/issues/8584

UI/window-basic-settings-stream.cpp

@@ -1617,6 +1617,10 @@ void OBSBasicSettings::ResetEncoders(bool streamOnly)
 		ui->simpleOutStrEncoder->addItem(
 			ENCODER_STR("Hardware.AMD.H264"),
 			QString(SIMPLE_ENCODER_AMD));
+	if (service_supports_encoder(vcodecs, "av1_texture_amf"))
+		ui->simpleOutStrEncoder->addItem(
+			ENCODER_STR("Hardware.AMD.AV1"),
+			QString(SIMPLE_ENCODER_AMD_AV1));
 /* Preprocessor guard required for the macOS version check */
 #ifdef __APPLE__
 	if (service_supports_encoder(