Android emulator not receiving push notifications
Solution 1:
Which target have your emulator? For Google Services like GCM, use a "Google APIs" (any version) target to receive push notifications
Solution 2:
Edit your Android Virtual Machine (AVD) Target to use 'Google APIs' to enable GCM Push Notifications to be received by the emulator.
Solution 3:
Was your emulator receiving Firebase push notifications before? If yes, force reboot your emulator.
Solution 4:
Ensure you connected a google account on the emulator