Add end-to-end test for Mouse-to-Touch compat feature

This adds an end-to-end test for Mouse-to-Touch compatibility feature.
This launches an activity, creates a virtual mouse, and verifies mouse
events received in the activity.

Bug: 424053337
Test: MouseToTouchCompatTest
Flag: com.android.hardware.input.mouse_to_touch_per_app_compat
Change-Id: I50293fbbc75f6213ab199f4ea31cff52ede2f8b8