Revert "Wait for LauncherModel loaded in waitForLauncherInitialized"

This reverts commit f8f00f42.

Reason for revert: DroidMonitor: Potential culprit for http://b/334162623.  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: Id165df41a87af4757abd3266b8643949ce012a08