MotionEvent: Differentiate directional support for AXIS_ORIENTATION

Ensure the private flags introduced in this topic do not get sent to
java.

Flag: NONE small behavioral change, where flagging is not required
Bug: 263310669
Test: atest TouchScreenTest libinput_tests inputflinger_tests
MotionEventTest

Change-Id: Ideef3eceaef3d8d2a55a545d23bef5e9e372bac4