Color picker & notification drawer custom background fix

	new file:   res/drawable-hdpi/ic_action_set.png
	new file:   res/drawable-mdpi/ic_action_set.png
	new file:   res/drawable-xhdpi/ic_action_set.png
	new file:   res/layout/dialog_color_picker.xml
	new file:   res/layout/slider_preference.xml
	modified:   res/values/pa_strings.xml
	new file:   src/com/android/settings/widget/SeekBarPreference.java
	new file:   src/net/margaritov/preference/colorpicker/AlphaPatternDrawable.java
	new file:   src/net/margaritov/preference/colorpicker/ColorPickerDialog.java
	new file:   src/net/margaritov/preference/colorpicker/ColorPickerPanelView.java
	new file:   src/net/margaritov/preference/colorpicker/ColorPickerPreference.java
	new file:   src/net/margaritov/preference/colorpicker/ColorPickerView.java

Change-Id: Ic365ef4af6fa31eed0afbf0a732e71086d746e20