Revert "Expose the HomeVisibilityListener API"

Revert "Add CTS for HomeVisibilityListener"

Revert submission 12775890-home-vis-listener

Reason for revert: broke build, b/170776449
Reverted Changes:
I8e6de3267:Add CTS for HomeVisibilityListener
I33d943603:Follow rename of HomeVisibilityObserver
I5d99f2bad:Expose the HomeVisibilityListener API

Change-Id: I9483fac8cf40ecfa6f80f6f66068978ebe493258
6 files changed