AOSP Android5.0 lollipop source code synchronous update method, aosplollipop

AOSP Android5.0 lollipop source code synchronous update method, aosplollipop

Repo init-u https://android.googlesource.com/platform/manifest-B android-5.0.0_r2repo sync-j16

Or

Repo init-u https://android.googlesource.com/platform/manifest-B lollipop-releaserepo sync-j16

Does Android L upgrade Android 44 to Android 50? Is it a new generation?

Yes.
Hope to adopt, kiss

How can I upgrade Samsung s4 to Android50?

Hello, because Android5.0 has not yet been released, it is unclear about how to refresh Android5.0. Have a good time and hope to adopt it. Thank you!