Merge "EntropyMixer: ensure new seed file is as good as old one" am: bcbd6fe8cd am: f11ba55d9b am: e0bb053ef0

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2050961

Change-Id: I29e5ba469f3ebd7a43e78a8d51c4a018ae5942c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>