Move some members to the "Q blacklist".

Based on some analysis, these fields/methods are likely false positives.
Set maxTargetSdk=P so that any apps using them are required to migrate off
them in future. See the bug for more details.

Exempted-From-Owner-Approval: Automatic changes to the codebase
affecting only @UnsupportedAppUsage annotations, themselves added
without requiring owners approval earlier.

Bug: 115609023
Test: m
Change-Id: I719b5c94e5b1f4fa562dd5d655953422958ad37e

core/java/android/net/NetworkCapabilities.java

@@ -21,6 +21,7 @@ import android.annotation.SystemApi;
 import android.annotation.TestApi;
 import android.annotation.UnsupportedAppUsage;
 import android.net.ConnectivityManager.NetworkCallback;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.ArraySet;
@@ -904,7 +905,7 @@ public final class NetworkCapabilities implements Parcelable {
      *         specifier. See {@link #setNetworkSpecifier}.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     public NetworkSpecifier getNetworkSpecifier() {
         return mNetworkSpecifier;
     }

core/java/android/net/NetworkState.java

@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.util.Slog;
@@ -34,7 +35,7 @@ public class NetworkState implements Parcelable {
     public final NetworkInfo networkInfo;
     public final LinkProperties linkProperties;
     public final NetworkCapabilities networkCapabilities;
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     public final Network network;
     public final String subscriberId;
     public final String networkId;