Merge "printflags: improve protobuf decode error message" into main am: dcbe6097 am: 6df36db6

Original change: https://android-review.googlesource.com/c/platform/build/+/2779288



Change-Id: I2a2405640a2c512e8f919f9af99b110a06e941e0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>