Merge "Check SPL downgrade before install OTA in recovery" am: bbde214b48 am: b30df4cd74 am: e01114fcee

Original change: https://android-review.googlesource.com/c/platform/bootable/recovery/+/1708986

Change-Id: I52052e3e0da4f53281f3a425eb5dff0906ac13b5