DO NOT MERGE Allow app switches for accessibility services

Set allow app switches so the accessibility service can start activity
without delay.

Bug: 141873810
TEST: atest AccessibilityServiceConnectionTest
Change-Id: I4204c4cf0baa1f66d6d2d73d56a342ae803d24dd
(cherry picked from commit 24ef87d5f1101c802b6e4b29a5c951803705ab8f)
3 files changed