uwb(service): Remove stack redundancies (2/2)

1. Rename IUwbAdapter2 -> IUwbAdapter
2. Rename IUwbRangingCallbacks2 -> IUwbRangingCallbacks
3. Move ranging callback permission check to
UwbSessionNotificationManager.
4. Remove all state from UwbServiceImpl.

Bug: b/196225233
Test: Manual testing.
Change-Id: Ie2ae471147d08096a3fe1fb0ea915ab39c838528
25 files changed