Move display id into MotionEvent

Display id is now part of MotionEvent.

Test: m -j inputflinger_tests_InputReader_test
inputflinger_tests_InputDispatcher_test libinput_tests_InputChannel_test
libinput_tests_InputEvent_test
libinput_tests_InputPublisherAndConsumer_test
libinput_tests_VelocityTracker_test StructLayout_test && adb push
out/target/product/$TARGET_PRODUCT/data/nativetest64/*
/data/nativetest64/
then run all native tests on the device
Bug: 64258305
Change-Id: I55afcbbc25b67afe6f7cc3457a1eca4b32651e4b