Inception is more about the starting point in time. It is a temporal reference.
Conception is more about the action of creating something. A child or an idea are formed and something is produced.
So one is about the production of something, and the other is about when something is produced.
It depends on the intended semantics of the speaker in this case. Which what they said would be correct to say the idea about the act of creating the feature list for Android was conceived, would be conception.
The temporal reference of when Android was introduced would be the inception.
The two words are definitely linked but not the same semantically in any way.