Revert^3 "Fix for a11yManagerService broadcastReceiver ANR"

This reverts commit 552f6eab.

Reason for revert: Likely culprit for b/338952107  - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I2eb76c951e3395417c75a55e537f1eeb54e48047