TTEC vacuum: inveret null value of activate dp.

Remain with the original assumption that pause missing means not paused.
Issue #1545

custom_components/tuya_local/devices/ttec_reobipro_vacuum.yaml

@@ -23,7 +23,7 @@ primary_entity:
         - dps_val: false
           value: true
         - dps_val: null
-          value: false
+          value: true
           hidden: true
     - id: 4
       type: string