Don't rotate inputflinger's display

This "undoes" the rotation in incoming displayviewports
so that inputflinger always works in the orientation the display
grew-up in

It also modifies existing gesture-monitors to deal with unrotated
coordinates

This is behind a flag:
   adb shell setprop persist.debug.per_window_input_rotation 1

Bug: 179274888
Test: phone should work like normal
      atest MotionEventTest (coretests)
Change-Id: Iaa7ff7d62e9f756af2c9c622ec508c5e538ec8bd