Google Group, join the beta test program, and you'll get a new update of your Facebook app through the Play Store with special features just for you. No need to sideload an app. There is also a Facebook for Android Beta Testers group on Facebook where you can share your thoughts.The best part about the program is that it works through the official options in the Play Store. So, all you have to do is join the Facebook Android app
In the app itself, you'll notice a new button in the overflow menu to report a bug in the app. Assuming Facebook takes this all seriously, maybe we'll see some big changes to the Android app soon enough.