Add INVALID_INPUT_DEVICE_ID to IInputConstants

The ID is used to reference invalid input devices before they are
initialized. For consistency the INVALID_INPUT_DEVICE_ID is also added
to the ReservcedInputDeviceId enum.

Test: Tested as part of ag/20002215
Bug: 244516415
Change-Id: I2055e8668780ecbcfdc201422fc1fd5ab3549ab6
2 files changed