Split out mappings for "airtap" and "grab", as well as mapping other Hand Interaction Profile actions (#1040)

* Remove unused overrides

* Update MRTK Default Input Actions.inputactions

Signed-off-by: Kurtis <keveleig@qti.qualcomm.com>

* Be more specific about "select"

Signed-off-by: Kurtis <keveleig@qti.qualcomm.com>

* Be more specific about a few more mappings

* Update MRTK Default Input Actions.inputactions

* Fix synthetic hand readings

* Add new "grab" actions for the grab interactor

* Add MRTKSimulatedController to grab mappings

* Update MRTK Default Input Actions.inputactions

* Update CHANGELOG.md

* Add Hand Interaction Profile to PC and Android OpenXR settings

* Regenerate OpenXR settings

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Signed-off-by: Kurtis <keveleig@qti.qualcomm.com>
Signed-off-by: Kurtis <3580640+keveleigh@users.noreply.github.com>

Author: keveleigh