Only capture touch when center or pointer pressed
Only capture touch when center or pointer pressed

NamelessRom/android_external_holocolorpicker,LarsWerkman/HoloColorPicker,georgelin422/HoloColorPicker,hannesa2/HoloColorPicker,jaohoang/HoloColorPicker,qingsong-xu/HoloColorPicker,JackLeeMing/Open,SufficientlySecure/HoloColorPicker,hgl888/HoloColorPicker,billmag/HoloColorPicker