Rework DB connection

[janesth]

Issue: Currently it's skipping some policy based on the current android version
DBConnection.java
if (android.os.Build.VERSION.SDK_INT > 9) { StrictMode.ThreadPolicy gfgPolicy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(gfgPolicy); }

Solution: do it the way it's supposed to be done in this version

Resources: https://www.geeksforgeeks.org/how-to-fix-android-os-networkonmainthreadexception/

[janesth]

Moving this issue to milestone v1.1 because other issues are more important and this doesn't interfere with the usability of the app.