[DOCS] Update CONTRIBUTING.md

[CHORE] Increment release & build number: 1.0.21 - 41

Clear Realm on asynchronous thread and also clear cookies

Multiple minor issues fixes

Use trySetError instead of tryError on DDPClientImpl since this class is usually used wrapped on Rx subscriptions when the first will throw an exception probably leading to an unexpected behavior or crash with a compose exception and the latter will just bail out

Fix a deadlock on RocketChatService causing some ANR errors

- In the case of RocketChatWebSocketThread.getStarted() returning an Error, we never release the webSocketThreadLock.

[RELEASE] Bump build to 1.2.0 (40)

[FIX] Always mutate ic_user_status_black_24dp drawable, so it don't end up …

[FIX] Crash that happens w/ old servers when invoking the REST API calls.

[FIX] Logout from single instance

[FIX] keyboard hidden again

Fix blink status bug

- Fixes an odd bug on some keyboards, where selecting a correction/suggestion would make the send button disappear.

[FIX] Disable message input while saving the message...

Also debounce clicks on MessageFormLayout