Expose NetworkScore to external caller

NetworkScore will be a part of mainline module, so the external
callers cannot call its hidden APIs. Expose needed APIs to
the external callers.

CTS-Coverage-Bug: 182963397
Bug: 182963397
Test: m
Change-Id: Iddf8c71a5f51a40bc6ff78626b3e8ee530d1b7eb
diff --git a/framework/api/system-current.txt b/framework/api/system-current.txt
index 358cea8..452e8c2 100644
--- a/framework/api/system-current.txt
+++ b/framework/api/system-current.txt
@@ -316,6 +316,19 @@
     method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_SIGNAL_STRENGTH_WAKEUP) public android.net.NetworkRequest.Builder setSignalStrength(int);
   }
 
+  public final class NetworkScore implements android.os.Parcelable {
+    method public int describeContents();
+    method public int getLegacyInt();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkScore> CREATOR;
+  }
+
+  public static final class NetworkScore.Builder {
+    ctor public NetworkScore.Builder();
+    method @NonNull public android.net.NetworkScore build();
+    method @NonNull public android.net.NetworkScore.Builder setLegacyInt(int);
+  }
+
   public final class OemNetworkPreferences implements android.os.Parcelable {
     method public int describeContents();
     method @NonNull public java.util.Map<java.lang.String,java.lang.Integer> getNetworkPreferences();
diff --git a/framework/src/android/net/NetworkScore.java b/framework/src/android/net/NetworkScore.java
index eadcb2d..6584993 100644
--- a/framework/src/android/net/NetworkScore.java
+++ b/framework/src/android/net/NetworkScore.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.NonNull;
+import android.annotation.SystemApi;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -29,7 +30,7 @@
  * network is considered for a particular use.
  * @hide
  */
-// TODO : @SystemApi when the implementation is complete
+@SystemApi
 public final class NetworkScore implements Parcelable {
     // This will be removed soon. Do *NOT* depend on it for any new code that is not part of
     // a migration.
@@ -62,6 +63,8 @@
 
     /**
      * @return whether this score has a particular policy.
+     *
+     * @hide
      */
     @VisibleForTesting
     public boolean hasPolicy(final int policy) {