Fix result status indicators

The color is changed from ffffff to 009688 to improve visibility
under a background of eeeeee

PS4: Switched to vector drawables (blunden)
PS6: Fixed the drawable size

Change-Id: Iaf8e4c5b158158f342afded5da6db57aa8d3ce0b

Conflicts:

	res/drawable-hdpi/ic_fail.png
	res/drawable-hdpi/ic_success.png
	res/drawable-mdpi/ic_fail.png
	res/drawable-mdpi/ic_success.png
	res/drawable-xhdpi/ic_fail.png
	res/drawable-xhdpi/ic_success.png