Uwb: Create a new Uwb system service

This thin AOSP service layer will trampoline all API calls to the vendor
UWB service.

In follow up CL's,
i. The AOSP service will perform all the permission checks
necessary for this API surface before forwarding the call to the vendor
UWB service.
ii. Similarly, it will perform necessary permission checks +
noteOp before forwarding the ranging callbacks from the vendor service
back to the apps.

Bug: 183904955
Test: atest android.uwb.cts.UwbManagerTest
Test: atest com.android.server.uwb
Change-Id: I2b367d1b6accc2f4e075cacb5c8e3c51f1faf5db