The next version of Steam Link for Android is now available as a beta build.

You can download it from Google Play by opting into the beta here:
https://play.google.com/apps/testing/com.valvesoftware.steamlink

Or downloading directly from Valve here:
https://media.steampowered.com/steamlink/android/latest/steamlink-android.apk

Changes in build 1.3.20.295:

• Added support for over 700 Android devices
  
• Speeded up connecting to remote Steam clients