public Builder addDisallowedApplication(@NonNull String packageName) {
            mConfig.disallowedApplications.add(packageName);
            return this;
        }
Adds an application that's denied access to the VPN connection.

By default, all applications are allowed access, except for those denied through this
method.  Denied applications will use networking as if the VPN wasn't running.

@param packageName The full name (e.g.: "com.google.apps.contacts") of an application.
@return this {@link Builder} object to facilitate chaining method calls.
netbare-core/src/main/java/com/github/megatronking/netbare/NetBareConfig.java