Merge "Migrate Slog usage in MultinetworkPolicyTracker to Log" am: 570985a03e am: 5fe62a1765

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1549720

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ide31b81db2a41c4ea60783195bff3d9bb8ff5440