[2/3] settings: Change density on the fly

Change-Id: Ifd036c75f0423c334f8e25aaf6b3229833e779d7

Conflicts:
	AndroidManifest.xml
	res/values/slim_strings.xml
	res/xml/anonymous_stats.xml
	src/com/android/settings/slim/InterfaceSettings.java
DPI changer fixes