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
am: ce12ffb017

* commit 'ce12ffb0176f1ed42caf82ad07996c06f556a582':
  add number constraint for samples per MotionEvent