[ecovacs] Fix device definition for T50 PRO OMNI (#20017)

Unlike the T30, this device uses the custom water amount feature. It
also was misdetected as T30S.

Fixes #19482

Signed-off-by: Danny Baumann <dannybaumann@web.de>

bundles/org.openhab.binding.ecovacs/src/main/resources/devices/supported_device_list.json

@@ -910,11 +910,6 @@
         "deviceClass": "cuoipb",
         "deviceClassLink": "z4lvk7"
     },
-    {
-        "modelName": "DEEBOT T30S PRO OMNI",
-        "deviceClass": "czjwet",
-        "deviceClassLink": "z4lvk7"
-    },
     {
         "modelName": "DEEBOT T30S PRO OMNI",
         "deviceClass": "elrxgb",
@@ -951,6 +946,31 @@
         "deviceClassLink": "z4lvk7"
     },
 
+    {
+        "modelName": "DEEBOT T50 PRO OMNI",
+        "deviceClass": "czjwet",
+        "protoVersion": "json_v2",
+        "usesMqtt": true,
+        "capabilities": [
+            "mopping_system",
+            "main_brush",
+            "spot_area_cleaning",
+            "custom_area_cleaning",
+            "scenario_cleaning",
+            "clean_speed_control",
+            "voice_reporting",
+            "read_network_info",
+            "unit_care_lifespan",
+            "round_mop_lifespan",
+            "true_detect_3d",
+            "mapping",
+            "auto_empty_station",
+            "air_drying",
+            "uses_clean_results_log_api",
+            "custom_water_amount"
+        ]
+    },
+
     {
         "modelName": "DEEBOT X8 PRO OMNI",
         "deviceClass": "n0vyif",