Like NetBSD but for mobile. Easy to port. Is it true the "Android" project rose from the ashes of an earlier company "Danger" who produced a NetBSD based mobi

Like NetBSD but for mobile. Easy to port. Is it true the "Android" project rose from the ashes of an earlier company "Danger" who produced a NetBSD based mobile OS for the T-mobile Sidekick? If true, why did founder of Android use NetBSD for the Sidekick, not Linux? Microsoft acquired Danger. "You know if you ever got me, you wouldn't have a clue what to do with me." - Being John Malkovich (1999) Maybe easier just to collect on Android sales via threatened patent assertion. IDK.