Customisation of android opensource messenger app Signal

Project Brief Require some simple customization to be made to open source messenger application Signal Messenger, on Android. [login to view URL] [login to view URL] A brief summary is below, but PLEASE READ the attached Word document for full details before bidding; - Hide icon - access via pin through dialer - Override default notifications with user customisable notification - do not appear in current running apps list - shake to close I have included source code for a similar project which I had completed but for a different android messenger called conversations. You can use this if you need to see how it had been done by someone else previously. Please read the attached word document for a more detailed description and ask me any questions you may have via freelancer. Thank you.