run-test build: Explicitly call generate-sources am: ab007c5446 am: 2e401ca982 am: 1b06200724

Original change: https://android-review.googlesource.com/c/platform/art/+/2265584

Change-Id: I974e024606051827198df4d2d492c71f551be67d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>