Support showTouches on multi-display (1/2)

Pass the displayId to PointerController to show the corresponding touch
spots.

Test: atest inputflinger_tests
Test: Use device support multi-display and touch screen (like mojave).
      Enable showTaps from develop options and check if show tap spots.
Bug: 120815589

Change-Id: I529ad2c9bfd891bc3372143fc663824efa99f53b