Update RenderScript docs to include Support Library APIs

Added new section to explain how to access the Support Library
RenderScript APIs in Eclipse.

Change-Id: Ife6e25bcc7b91c39bb399d1ace624e106a3f38bc
(cherry picked from commit f82b04d4ecb9450afc8a3679e7178bfa4ca782b8)
1 file changed