hwnav: system default behavior in base Compose

- Add rotary tick acuumulation as the default navigation logic.
- Add compose flag isHardwareNavigationHandlingEnabled to guard the
  hwnav path.

Bug: 520139487
Test: DispatchGenericMotionEventTest
Relnote: N/A
Change-Id: I609acc9c8bc51c6df5207471dbba51f694c6c171