Unwrapping transitive cursors.

When we get a cursor from a Directory it will likely
be wrapped into a CursorWrapper. CursorWrappers are
not CrossProcessCursors and cannot be returned over
the binder, so we need to unwrap them.

Change-Id: I2148d0cf72d8cce299019f3d24b8f4e269a762a3
1 file changed