Make edits to the project in Java

there is a ready project on java

https://fex.net/uk/s/boskzo5

we need to remove all unnecessary functions (I can't immediately say which will be unnecessary) the build has not been assembled by anyone yet. We will need to look at it in the process.

we need to insert a link to our website (it should essentially work like a web view)

we need to set our application icon

configure deep links (not just deep links but pass a parameter to our backend that will be in the link)

set up onesignal (pass user id to the backend for event push notifications)

that seems to be all

if anything, there is another build in which all these functions are already configured, we just need to adapt them to the new project (replace links and keys), but this build is on an older version of java and there may be outdated libraries, if there is a desire, it can be built from it. It is not critical for me