Move UsbDebuggingManager to new package

First step in separating the USB and ADB stacks. The ADB functionality
does not logically need USB, so move it to its own package initially to
make further detangling more clear.

Bug: 63820489
Test: make
Change-Id: I6cf57c4ebc6ec8956cdd7ce817bdc4bcf7ff27a9

• services/usb/java/com/android/server/adb/UsbDebuggingManager.java[Renamed from services/usb/java/com/android/server/usb/UsbDebuggingManager.java - diff]
• services/usb/java/com/android/server/usb/UsbDeviceManager.java[diff]