Remove include base/string/stringprintf.h am: 8bf1e69034 am: 88f6cf06bb

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/3298362

Change-Id: Ie78938ab87307b695f3c144d92a101fa48bd48d9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>