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

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

Change-Id: I8f27d3017823bd5d62cc557dea556ad9a2e4bf6e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>