Fix bug 5073637 - Market apps crashing FastScroller

It seems that some popular Market apps do not properly implement
SectionIndexer#getSectionForPosition and the framework did not
previously call it. Revert to more simplistic scrollbar behavior for
apps targeting sdk < Honeycomb.

Change-Id: If0b1f2b4db540de4bb8ba45798e498c09cddb42f
1 file changed