Add extra InputDeviceCharacteristics enum to avoid dependency on XR Module

[jdiehlUnity]

Description

Adds the InputDeviceCharacteristics enum into XRSupport so we don't depend on the type coming from the XR Module.
We already do the same thing here with the FeatureType enum.

Testing status & QA

Please describe the testing already done by you and what testing you request/recommend QA to execute. If you used or created any testing project please link them here too for QA.

Overall Product Risks

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• Complexity:
• Halo Effect:

Comments to reviewers

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Checklist

Before review:

• Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
  • For API change contains an example snippet and/or migration example.
  • JIRA ticket linked, example (case %%). If it is a private issue, just add the case ID without a link.
  • Jira port for the next release set as "Resolved".
• Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
  • Performance tests.
  • Integration tests.
• Docs for new/changed API's.
  • Xmldoc cross references are set correctly.
  • Added explanation how the API works.
  • Usage code examples added.
  • The manual is updated, if needed.

During merge:

• Commit message for squash-merge is prefixed with one of the list:
  • NEW: ___.
  • FIX: ___.
  • DOCS: ___.
  • CHANGE: ___.
  • RELEASE: 1.1.0-preview.3.

After merge:

• Create forward/backward port if needed. If you are blocked from creating a forward port now please add a task to ISX-1444.

[codecov-github-com]

Codecov Report

All modified and coverable lines are covered by tests ✅

@@           Coverage Diff            @@
##           develop    #2211   +/-   ##
========================================
  Coverage    68.11%   68.11%           
========================================
  Files          367      367           
  Lines        53603    53603           
========================================
  Hits         36512    36512           
  Misses       17091    17091           

Flag	Coverage Δ
mac_2021.3_pkg	5.40% <ø> (ø)
mac_2022.3_pkg	5.18% <ø> (ø)
mac_6000.0_pkg	5.19% <ø> (ø)
mac_6000.1_pkg	5.19% <ø> (ø)
mac_6000.2_pkg	5.19% <ø> (ø)
mac_trunk_pkg	5.19% <ø> (ø)
win_2021.3_pkg	5.41% <ø> (ø)
win_2022.3_pkg	5.18% <ø> (ø)
win_6000.0_pkg	5.19% <ø> (ø)
win_6000.1_pkg	5.19% <ø> (ø)
win_6000.2_pkg	5.19% <ø> (ø)
win_trunk_pkg	5.19% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...utsystem/InputSystem/Plugins/XR/GenericXRDevice.cs	87.87% <ø> (ø)
...utsystem/InputSystem/Plugins/XR/XRLayoutBuilder.cs	91.81% <ø> (ø)
...ty.inputsystem/InputSystem/Plugins/XR/XRSupport.cs	41.83% <ø> (ø)

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