Merge "Throw an error if a shell command results in an error." am: 90a74273e7 am: 785433678a am: abe9d91118

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2064787

Change-Id: Ia25d2a1fc4e81883327017443970e40046deecd6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>