locksettings: clean up logging of password history updates am: 0889b6d8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21724588



Change-Id: I2715a91a021defe139843d77421ff255a784bdc6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>