Extend the timeout of build_super_image am: fe5b3b8d5f

Original change: https://android-review.googlesource.com/c/platform/tools/acloud/+/3517294

Change-Id: I5bddd81c9da096a1e2e02ef5586bc82c342e6fa2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>