Revert "Refactor Paginated layouts to allow for setting page keys"

This reverts commit 880c2f66.

Reason for revert: DroidMonitor: Potential culprit for http://b/407802280 - verifying through ABTD before submittion . This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I846ea55ac5ced00f56294d393bf82ed479ddbd73