QuickSettings: New icons better matching stock

There icons should match the stock feel a bit better
in terms of size, design and color.

Change-Id: I1c8e6af9e48569e1c227c081495f70607cfe6d2b

Conflicts:
	packages/SystemUI/res/drawable-hdpi/ic_qs_gps_off.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_gps_on.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_lock_screen_off.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_lock_screen_on.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_ring_off.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_ring_on.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_ring_vibrate_on.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_sleep.png
	packages/SystemUI/res/drawable-hdpi/ic_qs_vibrate_on.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_gps_off.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_gps_on.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_lock_screen_off.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_lock_screen_on.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_ring_off.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_ring_on.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_ring_vibrate_on.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_sleep.png
	packages/SystemUI/res/drawable-mdpi/ic_qs_vibrate_on.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_gps_off.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_gps_on.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_lock_screen_off.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_lock_screen_on.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_ring_off.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_ring_on.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_ring_vibrate_on.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_sleep.png
	packages/SystemUI/res/drawable-xhdpi/ic_qs_vibrate_on.png