Merge "libsnapuserd: Handle empty response from server" into main am: 71707037

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3329574



Change-Id: Ib5b59644231c823abe4a0ed2e40a0d40e26d53bc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>