Empty message is displayed when it contains only a link

[steve-todorov]

• Your Rocket.Chat.Android app version: ####
  Experimental version (2018-09-19)

• Your Rocket.Chat server version: ####
  0.69.1

• Device model (or emulator) you're running with: ####
  Android 7.1

• Steps to reproduce:

1. Create a testing channel
2. Send the following message: [ abc ] ( somewhere ) <- remove white space
3. Results in a message which contains nothing in the android app. However, if you open it on PC or the web chat - it properly shows the link

[diegolmello]

@steve-todorov Thanks for reporting :)

[marceloschmidt]

@diegolmello that's the issue I also reported on our channel :)