Logging a11y actions in desktop windowing

Adding Aster UiEvent atoms and logging them when a11y services interact
with desktop windowing buttons (primarily in app handle & header)

Bug: 341319597
Test: atest DesktopModeWindowDecorationTests
Test: atest DesktopModeWindowDecorViewModelTests
Test: atest HandleMenuTest
Flag: EXEMPT metrics
Change-Id: Ia4f0901f2d32c46f01f2af7aeea8d0d28e12ce9a