Removing some of the API don't have to be @SystemApi

Some of the API we made @SystemApi won't be used by mainline
module. Removing these from the surface.

Bug: 151266974
Test: atest FrameworksNetTests
      atest FrameworksTelephonyTests
      atest FrameworksWifiTests

Change-Id: Ie30efa172f93a7557fb6ef56f4daf80e958c3787

core/java/android/net/NetworkAgent.java

@@ -78,6 +78,7 @@ public abstract class NetworkAgent {
     /**
      * The ID of the {@link NetworkProvider} that created this object, or
      * {@link NetworkProvider#ID_NONE} if unknown.
+     * @hide
      */
     public final int providerId;
 
@@ -584,6 +585,7 @@ public abstract class NetworkAgent {
      *
      * @deprecated this is for backward compatibility only.
      * @param legacySubtype the legacy subtype.
+     * @hide
      */
     @Deprecated
     public void setLegacySubtype(final int legacySubtype, @NonNull final String legacySubtypeName) {
@@ -608,6 +610,7 @@ public abstract class NetworkAgent {
      *
      * @deprecated this is for backward compatibility only.
      * @param extraInfo the ExtraInfo.
+     * @hide
      */
     @Deprecated
     public void setLegacyExtraInfo(@Nullable final String extraInfo) {
@@ -711,6 +714,7 @@ public abstract class NetworkAgent {
     /**
      * Called when ConnectivityService request a bandwidth update. The parent factory
      * shall try to overwrite this method and produce a bandwidth update if capable.
+     * @hide
      */
     public void onBandwidthUpdateRequested() {
         pollLceData();

core/java/android/net/NetworkAgentConfig.java

@@ -108,6 +108,7 @@ public final class NetworkAgentConfig implements Parcelable {
     /**
      *
      * @return whether the sign in to network notification is enabled by this configuration.
+     * @hide
      */
     public boolean isProvisioningNotificationEnabled() {
         return !provisioningNotificationDisabled;
@@ -122,6 +123,7 @@ public final class NetworkAgentConfig implements Parcelable {
 
     /**
      * @return the subscriber ID, or null if none.
+     * @hide
      */
     @Nullable
     public String getSubscriberId() {
@@ -138,6 +140,7 @@ public final class NetworkAgentConfig implements Parcelable {
 
     /**
      * @return whether NAT64 prefix detection is enabled.
+     * @hide
      */
     public boolean isNat64DetectionEnabled() {
         return !skip464xlat;
@@ -247,6 +250,7 @@ public final class NetworkAgentConfig implements Parcelable {
          * Sets the subscriber ID for this network.
          *
          * @return this builder, to facilitate chaining.
+         * @hide
          */
         @NonNull
         public Builder setSubscriberId(@Nullable String subscriberId) {
@@ -259,6 +263,7 @@ public final class NetworkAgentConfig implements Parcelable {
          * and reduce idle traffic on networks that are known to be IPv6-only without a NAT64.
          *
          * @return this builder, to facilitate chaining.
+         * @hide
          */
         @NonNull
         public Builder disableNat64Detection() {
@@ -271,6 +276,7 @@ public final class NetworkAgentConfig implements Parcelable {
          * perform its own carrier-specific provisioning procedure.
          *
          * @return this builder, to facilitate chaining.
+         * @hide
          */
         @NonNull
         public Builder disableProvisioningNotification() {

core/java/android/net/NetworkCapabilities.java

@@ -613,7 +613,6 @@ public final class NetworkCapabilities implements Parcelable {
      * @return {@code true} if the network should be restricted.
      * @hide
      */
-    @SystemApi
     public boolean deduceRestrictedCapability() {
         // Check if we have any capability that forces the network to be restricted.
         final boolean forceRestrictedCapability =

core/java/android/net/NetworkProvider.java

@@ -106,10 +106,12 @@ public class NetworkProvider {
     }
 
     // TODO: consider adding a register() method so ConnectivityManager does not need to call this.
+    /** @hide */
     public @Nullable Messenger getMessenger() {
         return mMessenger;
     }
 
+    /** @hide */
     public @NonNull String getName() {
         return mName;
     }