Fix issue #13366. Take account of stackFromBottom in computeVerticalScrollOffset().
Fix issue #13366. Take account of stackFromBottom in
computeVerticalScrollOffset().

Change-Id: I743708ef1ac05e358840f37010de36b7d0c6a346
Signed-off-by: Pieter-Jan Vandormael <c703f08e30018c056b84f3cd4a6b6ecfb0a76ab0@gmail.com>

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