am b29e3b9c: Merge "Change CursorTreeAdapter to close the cursors rather than deactivating them. Fix SimpleCursorTreeAdapter to allow a null cursor as an argument." into gingerbread

Merge commit 'b29e3b9cd00ced686a74121d3ca9c7380754793f' into gingerbread-plus-aosp

* commit 'b29e3b9cd00ced686a74121d3ca9c7380754793f':
  Change CursorTreeAdapter to close the cursors rather than deactivating them. Fix SimpleCursorTreeAdapter to allow a null cursor as an argument.