Icons from KitKat

PS2: use all drawables from KitKat
PS3: whiten out some toggles and few other icons (xdhpi only)
PS4: revert custom toggles that I did in PS3
PS5: add core/res/res drawables also
PS6: icon derp

Change-Id: Ie37c73ea6840791169eece12ee42f6d41c91360c

Conflicts:
	core/res/res/drawable-nodpi/default_wallpaper.jpg
	core/res/res/drawable-sw600dp-nodpi/default_wallpaper.jpg
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_0.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_0_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_1_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_2_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_3_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_4_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_0.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_1_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_2_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_3_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_4_fully.png