Move NetIdManager, ProfileNetworkPreferences

Move NetIdManager and ProfileNetworkPreferences from services/core to
packages/Connectivity/service.

This is a partial cherry-pick of a downstream change.

Bug: 186628461
Test: m
Merged-In: I454e8a0a8d0e0f9e6d21a8e8faf5a9e299962ad4
Change-Id: I6734c181dac39518b8d69be1e49d7f5f0a0a18da
diff --git a/services/core/java/com/android/server/NetIdManager.java b/service/src/com/android/server/NetIdManager.java
similarity index 100%
rename from services/core/java/com/android/server/NetIdManager.java
rename to service/src/com/android/server/NetIdManager.java
diff --git a/services/core/java/com/android/server/connectivity/ProfileNetworkPreferences.java b/service/src/com/android/server/connectivity/ProfileNetworkPreferences.java
similarity index 100%
rename from services/core/java/com/android/server/connectivity/ProfileNetworkPreferences.java
rename to service/src/com/android/server/connectivity/ProfileNetworkPreferences.java