Merge "aconfig: c++ read api to return an android::base::Result and cargo fmt"...

Merge "aconfig: c++ read api to return an android::base::Result and cargo fmt" into main am: 6c63da3c am: 430f7b9c

Original change: https://android-review.googlesource.com/c/platform/build/+/3001062



Change-Id: Ifeea63fdfdfc01e04c56c30a3c321c9466055dad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>