SysUI: New statusbar icons

Change-Id: Id766c91ee7fea0de66b22a500676f992b2c3a526

Conflicts:
	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.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_1_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_2.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_2_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_3.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_3_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_signal_4.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.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_1_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_2.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_2_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_3.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_3_fully.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_4.png
	packages/SystemUI/res/drawable-xhdpi/stat_sys_wifi_signal_4_fully.png