Create a new string to alert unsupported vpn start.

    <!-- Dialog subtitle warning for a VPN app that has an insecure type. [CHAR LIMIT=100]  -->

    <string name="vpn_insecure_dialog_subtitle">Not secure. Update to an IKEv2 VPN</string>

    <!-- Dialog message when user attempted to start a VPN type that is no longer supported. It is

         very unlikely, but not impossible, that a user has a very old VPN configuration that the

         newer device no longer supports. This message is displayed when the user tries to start

         this unsupported VPN. [CHAR LIMIT=NONE]  -->

    <string name="vpn_start_unsupported">Failed to start unsupported VPN.</string>

    <!-- Summary describing the always-on VPN feature. [CHAR LIMIT=NONE] -->

    <string name="vpn_lockdown_summary">Select a VPN profile to always remain connected to. Network traffic will only be allowed when connected to this VPN.</string>

                Toast.makeText(mContext, R.string.vpn_no_network, Toast.LENGTH_LONG).show();

            } catch (UnsupportedOperationException e) {

                Log.e(TAG, "Attempted to start an unsupported VPN type.");

                final AlertDialog dialog = new AlertDialog.Builder(mContext)

                        .setMessage(R.string.vpn_insecure_dialog_subtitle)

                final AlertDialog unusedDialog = new AlertDialog.Builder(mContext)

                        .setMessage(R.string.vpn_start_unsupported)

                        .setPositiveButton(android.R.string.ok, null)

                        .show();

            }