Update the All apps label to "Apps list"

Set the AccessibilityNodeInfo containerTitle to improve a11y for users
in predictionRow.

See expected behavior suggestion in  https://b.corp.google.com/issues/379640673#comment1

Video
Quickstep launcher: http://recall/-/cOtJfHR6buEyEHnRyCqzVE/eugH3ID7eenOuLwTszaLHk

Pixel launcher: http://recall/-/cOtJfHR6buEyEHnRyCqzVE/fftzwMRCy6N3o7OcwiGMdk

Bug: 379640673
Test: Manual
Flag: EXEMPT a11y bugfix
Change-Id: I23a8a142afb213c0801402a56bc134bc14f0f97d