Remove dupe events while 2-fingers scrolling

Move events may contain a history of other move events. When we split
the event, each of the resulting events has history. When the system
dispatches the events, it also dispatches the ones in the history.

We change these events with actions which are NOT ACTION_MOVE and
inject to input. But those histories are no longer consistent with what
happened and are causing InputDispatcher::injectInputEvent to enqueue
duplicated events of each historical pointer coord.

Bug: 74069091
Test: manual
Test: atest CtsAccessibilityTestCases
Test: atest CtsAccessibilityServiceTestCases

Change-Id: I2a9f5526cbeecfcc379f86624607190e16265405