title: android update firmware on AOSP
body: <p>I've tried to find a guide or sample to update firmware on IoT AOSP, but without success. The google sample on <a href="https://android.googlesource.com/platform/bootable/recovery/+/master/updater_sample/" rel="nofollow noreferrer">https://android.googlesource.com/platform/bootable/recovery/+/master/updater_sample/</a> is not clear and not easy to follow since android.os.UpdateEngine package cannot be imported. is there another approach to tackle firmware updates on AOSP?</p>