[3FT] When the chosen app is uninstalled

Use a LauncherApps callback get updates when a package is removed. Only switch to default gesture (i.e. mid click) when the gesture is used to launch app and the removed package matches the chosen app.

Demo in comment.

Bug: 409003996
Flag: com.android.settings.flags.touchpad_settings_design_update
Flag: com.android.settings.flags.three_finger_tap_app_launch
Test: TouchpadThreeFingerTapAppSelectionPreferenceControllerTest
Change-Id: I44369824b3ca289990b752a32f5b6a387ddcde8d