Mark inactive slot as invalid after OTA completion am: 9e6bfc1a01

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2221688

Change-Id: I24cffec4037006cae6f57c8476d1244f2343d71f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>