Fix bug of talkback speak when enter folder

Talkback will speak folder name twice when enter folder, the second
speaking is caused by breadcrumb which is implemented by spinner.
This is its original behavior when a11y view selected event. Block
this event initializing to prevent speak twice.

Fix: 130206303
Test: manual activate talkback to check
Test: atest DocumentsUIGoogleTests
Change-Id: I005821ed69293df6422e23de6190b12dd98d51f8