InputEventTimeline field fixes

Small fixes and removed isDown field from InputEventTimeline.
Modified LatencyAggregator to use inputEventActionType instead of isDown to distinguish between down and other types of motion events.

Bug: 270049345
Test: atest inputflinger_tests
Flag: EXEMPT bugfix
Change-Id: I3d0fd64baf7b3b5df412cfbd0525818667135b1c
7 files changed