Revert "Settings: Add time-context headers to the notification header [2/2]"

This reverts commit 715034076f9d47b4af39e67da1cf3e0f064707d6.

Conflicts:
	res/values-es/slim_strings.xml
	res/values/slim_strings.xml
	src/com/android/settings/slim/NotificationDrawerQsSettings.java

Change-Id: If9c4dd10a078e8402e40e5392e3a251ca9d0e712