Add maxTargetSdk restriction to unused APIs.

These are APIs that have @UnsupportedAppUsage but for which we don't
have any evidence of them currently being used, so should be safe to
remove from the unsupported list.

Bug: 170729553
Test: Treehugger
Merged-In: I626caf7c1fe46c5ab1f39c2895b42a34319f771a
Change-Id: I54e5ecd11e76ca1de3c5893e3a98b0108e735413
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 8fd2995..9b68d3f 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -354,7 +354,7 @@
      * @hide
      */
     @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static final String ACTION_TETHER_STATE_CHANGED =
             TetheringManager.ACTION_TETHER_STATE_CHANGED;
 
@@ -363,7 +363,7 @@
      * gives a String[] listing all the interfaces configured for
      * tethering and currently available for tethering.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static final String EXTRA_AVAILABLE_TETHER = TetheringManager.EXTRA_AVAILABLE_TETHER;
 
     /**
@@ -378,7 +378,7 @@
      * gives a String[] listing all the interfaces currently tethered
      * (ie, has DHCPv4 support and packets potentially forwarded/NATed)
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static final String EXTRA_ACTIVE_TETHER = TetheringManager.EXTRA_ACTIVE_TETHER;
 
     /**
@@ -387,7 +387,7 @@
      * failed.  Use {@link #getLastTetherError} to find the error code
      * for any interfaces listed here.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static final String EXTRA_ERRORED_TETHER = TetheringManager.EXTRA_ERRORED_TETHER;
 
     /**
@@ -850,7 +850,7 @@
      * {@hide}
      */
     @Deprecated
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static String getNetworkTypeName(int type) {
         switch (type) {
           case TYPE_NONE:
@@ -1173,7 +1173,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.NETWORK_STACK)
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public NetworkInfo getActiveNetworkInfoForUid(int uid) {
         return getActiveNetworkInfoForUid(uid, false);
     }
@@ -1520,7 +1520,7 @@
         return 1;
     }
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private NetworkCapabilities networkCapabilitiesForFeature(int networkType, String feature) {
         if (networkType == TYPE_MOBILE) {
             switch (feature) {
@@ -1606,7 +1606,7 @@
         };
     }
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private static final HashMap<NetworkCapabilities, LegacyRequest> sLegacyRequests =
             new HashMap<>();
 
@@ -1635,7 +1635,7 @@
         Log.d(TAG, "expireRequest with " + ourSeqNum + ", " + sequenceNum);
     }
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private NetworkRequest requestNetworkForFeatureLocked(NetworkCapabilities netCap) {
         int delay = -1;
         int type = legacyTypeForNetworkCapabilities(netCap);
@@ -1665,7 +1665,7 @@
         }
     }
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private boolean removeRequestForFeature(NetworkCapabilities netCap) {
         final LegacyRequest l;
         synchronized (sLegacyRequests) {
@@ -1732,17 +1732,17 @@
 
     /** @hide */
     public static class PacketKeepaliveCallback {
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public PacketKeepaliveCallback() {
         }
         /** The requested keepalive was successfully started. */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void onStarted() {}
         /** The keepalive was successfully stopped. */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void onStopped() {}
         /** An error occurred. */
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void onError(int error) {}
     }
 
@@ -1806,7 +1806,7 @@
 
         private volatile Integer mSlot;
 
-        @UnsupportedAppUsage
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
         public void stop() {
             try {
                 mExecutor.execute(() -> {
@@ -1875,7 +1875,7 @@
      *
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public PacketKeepalive startNattKeepalive(
             Network network, int intervalSeconds, PacketKeepaliveCallback callback,
             InetAddress srcAddr, int srcPort, InetAddress dstAddr) {
@@ -2110,7 +2110,7 @@
 
     /** {@hide} */
     @Deprecated
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
         try {
             return mService.getActiveNetworkQuotaInfo();
@@ -2408,7 +2408,7 @@
      *
      * {@hide}
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Deprecated
     public int tether(String iface) {
         return mTetheringManager.tether(iface);
@@ -2849,7 +2849,7 @@
      * {@hide}
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Deprecated
     public int getLastTetherError(String iface) {
         int error = mTetheringManager.getLastTetherError(iface);
@@ -4659,7 +4659,7 @@
      * @deprecated This is strictly for legacy usage to support {@link #startUsingNetworkFeature}.
      */
     @Deprecated
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static boolean setProcessDefaultNetworkForHostResolution(Network network) {
         return NetworkUtils.bindProcessToNetworkForHostResolution(
                 (network == null) ? NETID_UNSET : network.getNetIdForResolv());
diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index 059ec28..4173200 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -73,7 +73,7 @@
 
     NetworkCapabilities getNetworkCapabilities(in Network network, String callingPackageName);
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     NetworkState[] getAllNetworkState();
 
     NetworkQuotaInfo getActiveNetworkQuotaInfo();
@@ -134,7 +134,7 @@
 
     VpnConfig getVpnConfig(int userId);
 
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     void startLegacyVpn(in VpnProfile profile);
 
     LegacyVpnInfo getLegacyVpnInfo(int userId);
diff --git a/core/java/android/net/IpConfiguration.java b/core/java/android/net/IpConfiguration.java
index 23d5ff7..0b20564 100644
--- a/core/java/android/net/IpConfiguration.java
+++ b/core/java/android/net/IpConfiguration.java
@@ -21,6 +21,7 @@
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -98,7 +99,7 @@
     }
 
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public IpConfiguration(IpAssignment ipAssignment,
                            ProxySettings proxySettings,
                            StaticIpConfiguration staticIpConfiguration,
diff --git a/core/java/android/net/LinkProperties.java b/core/java/android/net/LinkProperties.java
index 616ccbe..aa4b154 100644
--- a/core/java/android/net/LinkProperties.java
+++ b/core/java/android/net/LinkProperties.java
@@ -111,7 +111,7 @@
      *
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static ProvisioningChange compareProvisioning(
             LinkProperties before, LinkProperties after) {
         if (before.isProvisioned() && after.isProvisioned()) {
@@ -849,7 +849,7 @@
      * Returns all the links stacked on top of this link.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public @NonNull List<LinkProperties> getStackedLinks() {
         if (mStackedLinks.isEmpty()) {
             return Collections.emptyList();
@@ -1448,7 +1448,7 @@
      * @return {@code true} if both are identical, {@code false} otherwise.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public boolean isIdenticalStackedLinks(@NonNull LinkProperties target) {
         if (!mStackedLinks.keySet().equals(target.mStackedLinks.keySet())) {
             return false;
diff --git a/core/java/android/net/MacAddress.java b/core/java/android/net/MacAddress.java
index 0eb3c1e..178183d 100644
--- a/core/java/android/net/MacAddress.java
+++ b/core/java/android/net/MacAddress.java
@@ -22,6 +22,7 @@
 import android.compat.annotation.UnsupportedAppUsage;
 import android.net.util.MacAddressUtils;
 import android.net.wifi.WifiInfo;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -58,7 +59,7 @@
      * <p>Not publicly exposed or treated specially since the OUI 00:00:00 is registered.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static final MacAddress ALL_ZEROS_ADDRESS = new MacAddress(0);
 
     /** @hide */
diff --git a/core/java/android/net/Network.java b/core/java/android/net/Network.java
index 2561938..f98a1f8 100644
--- a/core/java/android/net/Network.java
+++ b/core/java/android/net/Network.java
@@ -19,6 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.system.ErrnoException;
@@ -109,7 +110,7 @@
     /**
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public Network(int netId) {
         this(netId, false);
     }
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index 12ddc62..f806b56 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -133,7 +133,7 @@
      * Represents the network's capabilities.  If any are specified they will be satisfied
      * by any Network that matches all of them.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     private long mNetworkCapabilities;
 
     /**
@@ -1288,7 +1288,7 @@
      *
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public boolean hasSignalStrength() {
         return mSignalStrength > SIGNAL_STRENGTH_UNSPECIFIED;
     }
@@ -1927,7 +1927,7 @@
     /**
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static @NonNull String transportNamesOf(@Nullable @Transport int[] types) {
         StringJoiner joiner = new StringJoiner("|");
         if (types != null) {
diff --git a/core/java/android/net/NetworkRequest.java b/core/java/android/net/NetworkRequest.java
index 473e6c5..dc16d74 100644
--- a/core/java/android/net/NetworkRequest.java
+++ b/core/java/android/net/NetworkRequest.java
@@ -43,7 +43,7 @@
      * The {@link NetworkCapabilities} that define this request.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public final @NonNull NetworkCapabilities networkCapabilities;
 
     /**
@@ -52,7 +52,7 @@
      * the request.
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public final int requestId;
 
     /**
diff --git a/core/java/android/net/NetworkUtils.java b/core/java/android/net/NetworkUtils.java
index 1e5b6d5..a0faafa 100644
--- a/core/java/android/net/NetworkUtils.java
+++ b/core/java/android/net/NetworkUtils.java
@@ -98,7 +98,7 @@
      * this socket will go directly to the underlying network, so its traffic will not be
      * forwarded through the VPN.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static boolean protectFromVpn(FileDescriptor fd) {
         return protectFromVpn(fd.getInt$());
     }
@@ -223,7 +223,7 @@
      * @hide
      * @deprecated use {@link Inet4AddressUtils#netmaskToPrefixLength(Inet4Address)}
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Deprecated
     public static int netmaskToPrefixLength(Inet4Address netmask) {
         // This is only here because some apps seem to be using it (@UnsupportedAppUsage).
@@ -290,7 +290,7 @@
     /**
      * Returns the implicit netmask of an IPv4 address, as was the custom before 1993.
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public static int getImplicitNetmask(Inet4Address address) {
         // Only here because it seems to be used by apps
         return Inet4AddressUtils.getImplicitNetmask(address);
diff --git a/core/java/android/net/RouteInfo.java b/core/java/android/net/RouteInfo.java
index 62aebb0..6166a75 100644
--- a/core/java/android/net/RouteInfo.java
+++ b/core/java/android/net/RouteInfo.java
@@ -232,7 +232,7 @@
      *
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     public RouteInfo(@Nullable IpPrefix destination, @Nullable InetAddress gateway,
             @Nullable String iface) {
         this(destination, gateway, iface, RTN_UNICAST);
@@ -501,7 +501,7 @@
      *
      * @hide
      */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Nullable
     public static RouteInfo selectBestRoute(Collection<RouteInfo> routes, InetAddress dest) {
         return NetUtils.selectBestRoute(routes, dest);
diff --git a/core/java/android/net/StaticIpConfiguration.java b/core/java/android/net/StaticIpConfiguration.java
index f56d656..ce54597 100644
--- a/core/java/android/net/StaticIpConfiguration.java
+++ b/core/java/android/net/StaticIpConfiguration.java
@@ -20,6 +20,7 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -53,19 +54,19 @@
 @SystemApi
 public final class StaticIpConfiguration implements Parcelable {
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Nullable
     public LinkAddress ipAddress;
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Nullable
     public InetAddress gateway;
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @NonNull
     public final ArrayList<InetAddress> dnsServers;
     /** @hide */
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
     @Nullable
     public String domains;