Add hidden API to query the bluetooth address of an InputDevice

Since revealing the bluetooth address of an input device can reveal
whether bluetooth is enabled, we require the BLUETOOTH permission for
this API.

This also means we cannot send the bluetooth address to apps using the
InputDevice class. We add an IInputManager method to query the address
instead that performs the permission check.

Since we are not using the Java InputDevice class to store the address,
we must cache the vector of last-reported InputDeviceInfos in
NativeInputManager.

DD: go/inputdevice-battery-notifications

Bug: 243005009
Test: manual
Change-Id: I560cb170ab7008314821e5150caf4868efb5d8d5