Revert "Revert "remove recents memory indicator from settings(2/2)""

This reverts commit 9bda00092e64bd69e16f52a04a08f0cdeb6a8df5.

Change-Id: I531a2a502fea8ec67e3cee358d634cc3fd738b17
Merge "Revert "Revert "remove recents memory indicator from settings(2/2)""" into android-4.4