Add AdbTransportType.aidl. Add AdbWifi internal API stubs.

Since wireless debugging can be enabled without usb debugging enabled,
we'll need to differentiate between which transport is enabled.

Also added the internal AdbManager stubs for wireless debugging. Adding
implementation in separate CL to get around merge conflict with a SysUI
CL in the stack.

BUG: b/111434128

Test: make
Exempt-From-Owner-Approval: already approved
Change-Id: I4e1ae6398f291f321e61e7eb119564ebd5e54c2e