Filter spam notifications

Change-Id: Ibf2377cd7491c7e0e9e9c9657e9e65eef1876ee3
Merge remote-tracking branch 'CM/cm-11.0' into cm-11.0-beta

Conflicts:
	packages/SystemUI/AndroidManifest.xml
	packages/SystemUI/res/menu/notification_popup_menu.xml
	packages/SystemUI/src/com/android/systemui/statusbar/BaseStatusBar.java
	services/java/com/android/server/NotificationManagerService.java

Change-Id: I0c25fe1f5b5a60ab99facc5b43155871124d6613