Merge "core/Makefile: Add desktop update image target hook" into main am: 2366366e

Original change: https://android-review.googlesource.com/c/platform/build/+/3241411



Change-Id: I3f3242e276f55499e408f983484b7578dc1b9dd9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>