Revert "Ensure visible activities when device is unlocked."

Causes issues with window life-cycle...

Bug: 37119770
Bug: 37244415
Bug: 37281544
This reverts commit 7004a8801d0a60013681a86043bab74b4d42d680.

Change-Id: I0039db6e44488cd82ef745aa979bc8549fd8aeed
2 files changed