[44/n] Implement TaskInfoLetterboxLifecycleEventFactory

The TaskInfoLetterboxLifecycleEventFactory allows to create
a LetterboxLifecycleEvent from the information in TaskInfo.

Flag: com.android.window.flags.app_compat_refactoring
Bug: 409043134
Test: atest WMShellUnitTests:MultiLetterboxLifecycleEventFactoryTest
Test: atest WMShellUnitTests:TaskInfoLetterboxLifecycleEventFactoryTest
Test: atest WMShellUnitTests:LetterboxLifecycleControllerImplTest
Test: atest WMShellUnitTests:LetterboxLifecycleEventTest.kt
Test: atest WMShellUnitTests:TaskInfoLetterboxLifecycleEventFactoryTest

Change-Id: Iec1d039a16fed70462247baf307370dd0fa4c865