[AOA FFS Implementation] Adding support for HID protocols in AOA.

This change adds support for USB HID protocols in AOA.
Specifically the requests for:
- REGISTER_HID
- UNREGISTER_HID
- SET_HID_REPORT_DESC
- SEND_HID_EVENT
These requests are used to register a HID device with a unique ID
using the Uhid driver, set the report descriptor of the device.
It also handles the sending events received from the HID device.

Bug: 407985367
Bug: 421807206
Test: Tested manually using the WebAoa application to ensure all events
are being processed.Also verified with CTS Verifier app.
Flag: android.hardware.usb.flags.enable_aoa_userspace_implementation

Change-Id: I6ab88b47a1f716193a6eb41aeb32c6d6c5e3eda1