Set correct bubble traversal order for a11y

Bug: 158006052
Test: atest SystemUITests
Test: manual, video recording: https://drive.google.com/file/d/19OrHgS6RmhD522_Kz-nzBptsdODpxGev/view?usp=sharing
Change-Id: Iec291bc9e32f82e1985803ad43cc5bfb24905493
2 files changed