[Android]: Create project skeleton
[Android]: Add login screen
[Android]: Add register screen
[Android]: Register user on server
[Android]: Login on server
[Android]: Add contacts screen
[Android]: Add contacts menu
[Android]: Add Logout
[Android]: Retrieve contacts
[Android]: Show contact name and email
[Android]: Remove login successful message
[Android]: Missed Constants
[Android]: Store logged user
[Android]: Add message screen
[Android]: Send message
[Android]: Fix registration message
[Android]: Remove message feature
[Android]: Add contact screen
[Android]: Add new contact on server
[Android]: Refactor user register