Commercial certificate to download provider.json

Removed the default danger_on = true in the debug build.
Disable proguard in release build.

release apk is not working ok with proguard.
Merge branch 'bug/provider.json-isn't-downloaded-without-danger_on-set-to-true-#5568' into develop
Merge branch 'develop' into release-0.5.1
Bump build number and version - 0.5.1RC2