EndToEndNativeInputTest: print the event received unexpectedly

To learn more about how the test is failing, let's print the events that
are received expectedly.

Currently, the test uncropped_container_replaces_touchable_region_with_null_crop
fails intermittently because it actually receives an event when we are
expecting it to be dropped instead.

Bug: 331747627
Test: TEST=libgui_test; m $TEST && adb sync && adb shell -t /data/nativetest64/$TEST/$TEST --gtest_filter="*input*"
Change-Id: I297950e8a197962c8adb0a9bcb044ce35a723d1e