W/ManagedChannelImpl: [{0}] Failed to resolve name. status={1}

@AlleyOOP is right. Restarting emulator worked for me.

There is no Connection to the internet in the device which your app running on!

The above-mentioned issue occurred to me, this happens because of network connection. Try turning on and of your network connection if it is a physical device.

If Virtual device, Restart the device