add number constraint for samples per MotionEvent am: 5d17838ade am: 72c8ca4a01 am: 9964d83869 am: 90dc6dc825 am: 9830f11dc6 am: a82ace99f7 am: 711c7becb0 am: 928a4879e4
am: cd9aad3a95

* commit 'cd9aad3a95c1fbb3062abada8cb851a41e79556d':
  add number constraint for samples per MotionEvent