[Android] GestureDetector: sigle finger touch event sequence

If your finger tapping on tab, it'll trigger event in turn:

• OnTouch  (finger down on tab)
• OnTouchEvent
• OnDown
• OnTouch  (finger lift off tab)
• OnTouchEvent
• OnSingleTapUp
• OnSingleTapConfirmed   (event by OnDoubleTapListener)

If your finger long press on tab, it'll trigger event in turn:

• OnTouch  (finger down on tab)
• OnTouchEvent
• OnDown
• OnLongPress
• OnTouch  (finger lift off tab)
• OnTouchEvent

If your finger double-click on tab, it'll trigger event in turn:

• OnTouch  (finger down on tab first time)
• OnTouchEvent
• OnDown
• OnTouch  (finger lift off tab)
• OnTouchEvent
• OnSingleTapUp
• OnTouch  (finger down on tab second time)
• OnTouchEvent
• OnDoubleTap
• OnDoubleTapEvent  (down by OnDoubleTapListener)
• OnDown
• OnTouch  (finger lift off tab)
• OnTouchEvent
• OnDoubleTapEvent  (up by OnDoubleTapListener)

If your finger touch and slide across tab, it'll trigger event in turn:

• OnTouch  (finger down on tab)
• OnTouchEvent
• OnDown
• OnShowPress
• OnTouch  (finger move on tab)
• OnTouchEvent
• OnScroll
• OnTouch  (finger lift off tab)
• OnTouchEvent
• OnFling