Refactor smooth scrolling sub-row calculation and clamp target
Refactor smooth scrolling sub-row calculation and clamp target

BUG: 13205615
Change-Id: If3757be35593a072ba6e92aa9da085330a12fd9d

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base