Ignore Ipv6 route delete request on Android and set ipv4 verbosity to 7

Ignore Ipv6 route delete request on Android and set ipv4 verbosity to 7

Android has no facility nor need one to delete routes as routes are
automatically cleaned up when the tun interface is closed. Also adjust
the IPv4 message to be only shown and verb 7 and rephrase the message.

Change-Id: If8f920d378c31e9ea773ce1f56f3df50f1ec36cd
Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20230712094620.569273-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg26848.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit ab01eaf49fa9341ff647206bd6e3017770cc0674)