Newly introduced Facebook in Android's testing program, there is a process going on to know feedback of Android users. For this they launched a new program named as "Alpha Testing Program".
As it is still in the developmental process, Facebook is looking out for some reactions about Android users.
Facebook wants to get feedback at an earlier stage in the development process.As stated in "The Next Web", both the alpha and beta programs will be pretty similar.
More information on this update here: "Alpha Testing Program"