I don't know about Android, but Apple obviously worked with Cisco to put their VPN client on the phone, it even has the Cisco logo. I don't think Apple went and developed it themselves.
There actually is a built-in IPsec client but it is IKEv2, so not as commonly supported.
I believe Cisco owns/owned "iphone" too. I remember there were some negotiations over that but I don't know what Cisco got out of Apple for it. I didn't know they also had to haggle over IOS, although it makes sense.
If I remember correctly the iPhone one was not Cisco related. I know for a fact that in Canada iPhone was owned by a small company called Comwave for their VoIP service. I think they got a pile of money from Apple for that as all of a sudden their commercials got better and even used real celebrities. I am also pretty sure that their was a South American company in a similar position that did a deal with Apple.
Has anyone every successfully connected to a Cisco ASA 5505 firewall using the IKEv2 protocol on Windows Phone?