Is Android or Windows an RTOS?

No, Android is not a Real Time Operating System. An OS should be time deterministic and there by being predictable to become RTOS. In Android we cannot guarantee that “this app will open within this time” or “some task will complete within a specific time”.

Is Android an embedded operating system?

Embedded Android

At first blush, Android may sound like an odd choice as an embedded OS, but in fact Android is already an embedded OS, its roots stemming from Embedded Linux. … All of these things combine to make creating an embedded system more accessible to developers and manufacturers.