Merge "Check if an installed file exists and report error if not." am: bd5a6e88 am: 1b3b6ff8

Original change: https://android-review.googlesource.com/c/platform/build/+/2527433



Change-Id: I287adc2e6ac3642368e46d09fc0468819d599783
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>