Revert "Use shell command to clear overview"

Revert submission 33125528-clear-overview

Reason for revert: DroidMonitor: Potential culprit for http://b/419308456 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Bug: 419308456

Reverted changes: /q/submissionid:33125528-clear-overview

Change-Id: I742b15010c3d902345770355baa8d743a3aae249
20 files changed