FIX: Provide explicit selected device requirement index for a new control scheme with no devices (#2079)

Author: tspiller

Packages/com.unity.inputsystem/CHANGELOG.md

@@ -31,6 +31,7 @@ however, it has to be formatted properly to pass verification tests.
 - Fixed documentation to clarify bindings with modifiers `overrideModifiersNeedToBePressedFirst` configuration [ISXB-806](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-806).
 - Fixed an issue in `Samples/Visualizers/GamepadVisualizer.unity` sample where the visualization wouldn't handle device disconnects or current device changes properly (ISXB-1243).
 - Fixed an issue when displaying Serialized InputAction's Processor properties inside the Inspector window. [ISXB-1269](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-1269)
+- Fixed an issue with default device selection when adding new Control Scheme.
 
 ### Changed
 - Added back the InputManager to InputSystem project-wide asset migration code with performance improvement (ISX-2086).

Packages/com.unity.inputsystem/InputSystem/Editor/UITKAssetEditor/Commands/ControlSchemeCommands.cs

@@ -18,7 +18,7 @@ public static Command AddNewControlScheme()
             {
                 state.m_Analytics?.RegisterControlSchemeEdit();
                 return state.With(selectedControlScheme: new InputControlScheme(
-                    MakeUniqueControlSchemeName(state, kNewControlSchemeName)));
+                    MakeUniqueControlSchemeName(state, kNewControlSchemeName)), selectedDeviceRequirementIndex: -1);
             };
         }