Replace libchrome size() with C++ standard ones am: 91aa21747d

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/3309624

Change-Id: I0158fe8553c83ae19ff1e589723287a6130d22ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>