Move secretkeeper to separate repo am: 88d9fbcafc

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Virtualization/+/2843395

Change-Id: I0e3606386f24dc7bd3e80a815ad5875d56cbab6f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>