Is the Android device ID included in the Android version update?
Device ID is a 64-bit number (as a hexadecimal string) that is randomly generated on the first boot of devices and must remain constant throughout the life of the device.
(The value may change if the device is factory reset.)
The device ID does not change when the Android version is updated to the latest. If you would like to change your Device ID, please visit here .
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This may no longer be the correct answer. Following is from https://android-developers.googleblog.com/2017/04/changes-to-device-identifiers-in.html
Android ID
In O, the Android ID (Settings.Secure.ANDROID_ID or SSAID) has a different meaning for each app and each user on the device. Developers requiring a device-specific ID should instead use a drop ID such as an advertising ID, giving users more control. The ad ID also provides a user-configurable setting to limit ad tracking.
Additionally in Android O:
The ANDROID_ID value will not change when uninstalling / reinstalling a package if the package name and signing key are the same. Applications can rely on this value to maintain state through reinstallations.
If the app was installed on an earlier Android device, the Android ID remains the same when the device is updated to Android O, unless the app is uninstalled and reinstalled.
The Android id value only changes if the device is factory reset or if the signing key rotates between uninstall and reinstall events.
This change is only required for device manufacturers submitting Google Play services and advertising ID. Other device manufacturers may provide an alternate drop ID or continue to provide the ANDROID ID.
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