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

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

Change-Id: I069e4aa96c63eae85e247cff44f7d26b3eda94f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>