Revert "Fix issue with Shell listeners being unbound if SysUI is restarted"

This reverts commit 34e384d2e1a381e1b18e7da90227fb61b2e75172.

Reason for revert: Multiuser performance (b/208276322)

Change-Id: Icd27ab3095c446895360f8e2faa7f9c92ab2cf01
Bug: 208276322
4 files changed