diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 310db9a..c2e4a90 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -40,7 +40,17 @@
 import static android.net.ConnectivityManager.BLOCKED_REASON_LOCKDOWN_VPN;
 import static android.net.ConnectivityManager.BLOCKED_REASON_NONE;
 import static android.net.ConnectivityManager.BLOCKED_REASON_NETWORK_RESTRICTED;
+import static android.net.ConnectivityManager.CALLBACK_AVAILABLE;
+import static android.net.ConnectivityManager.CALLBACK_BLK_CHANGED;
+import static android.net.ConnectivityManager.CALLBACK_CAP_CHANGED;
 import static android.net.ConnectivityManager.CALLBACK_IP_CHANGED;
+import static android.net.ConnectivityManager.CALLBACK_LOCAL_NETWORK_INFO_CHANGED;
+import static android.net.ConnectivityManager.CALLBACK_LOSING;
+import static android.net.ConnectivityManager.CALLBACK_LOST;
+import static android.net.ConnectivityManager.CALLBACK_PRECHECK;
+import static android.net.ConnectivityManager.CALLBACK_RESUMED;
+import static android.net.ConnectivityManager.CALLBACK_SUSPENDED;
+import static android.net.ConnectivityManager.CALLBACK_UNAVAIL;
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
 import static android.net.ConnectivityManager.FIREWALL_CHAIN_BACKGROUND;
 import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
@@ -5364,7 +5374,7 @@
         // by other networks that are already connected. Perhaps that can be done by
         // sending all CALLBACK_LOST messages (for requests, not listens) at the end
         // of rematchAllNetworksAndRequests
-        notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);
+        notifyNetworkCallbacks(nai, CALLBACK_LOST);
         mKeepaliveTracker.handleStopAllKeepalives(nai, SocketKeepalive.ERROR_INVALID_NETWORK);
 
         mQosCallbackTracker.handleNetworkReleased(nai.network);
@@ -5486,8 +5496,7 @@
             // correctly contains null as an upstream.
             if (sendCallbacks) {
                 nri.setSatisfier(null, null);
-                notifyNetworkCallbacks(local,
-                        ConnectivityManager.CALLBACK_LOCAL_NETWORK_INFO_CHANGED);
+                notifyNetworkCallbacks(local, CALLBACK_LOCAL_NETWORK_INFO_CHANGED);
             }
         }
 
@@ -5862,8 +5871,7 @@
             log("releasing " + nri.mRequests.get(0) + " (timeout)");
         }
         handleRemoveNetworkRequest(nri);
-        callCallbackForRequest(
-                nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0);
+        callCallbackForRequest(nri, null, CALLBACK_UNAVAIL, 0);
     }
 
     private void handleReleaseNetworkRequest(@NonNull final NetworkRequest request,
@@ -5879,7 +5887,7 @@
         }
         handleRemoveNetworkRequest(nri);
         if (callOnUnavailable) {
-            callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0);
+            callCallbackForRequest(nri, null, CALLBACK_UNAVAIL, 0);
         }
     }
 
@@ -7035,7 +7043,7 @@
         // should have its link properties fixed up for PAC proxies.
         mProxyTracker.updateDefaultNetworkProxyPortForPAC(nai.linkProperties, nai.network);
         if (nai.everConnected()) {
-            notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_IP_CHANGED);
+            notifyNetworkCallbacks(nai, CALLBACK_IP_CHANGED);
         }
     }
 
@@ -7792,10 +7800,52 @@
                     + " callback flags: " + mCallbackFlags
                     + " order: " + mPreferenceOrder
                     + " isUidTracked: " + mUidTrackedForBlockedStatus
-                    + " declaredMethods: 0x" + Integer.toHexString(mDeclaredMethodsFlags);
+                    + " declaredMethods: " + declaredMethodsFlagsToString(mDeclaredMethodsFlags);
         }
     }
 
+    /**
+     * Get a readable String for a bitmask of declared methods.
+     */
+    @VisibleForTesting
+    public static String declaredMethodsFlagsToString(int flags) {
+        if (flags == DECLARED_METHODS_NONE) {
+            return "NONE";
+        }
+        if (flags == DECLARED_METHODS_ALL) {
+            return "ALL";
+        }
+        final StringBuilder sb = new StringBuilder();
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_PRECHECK, "PRECHK", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_AVAILABLE, "AVAIL", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_LOSING, "LOSING", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_LOST, "LOST", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_UNAVAIL, "UNAVAIL", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_CAP_CHANGED, "NC", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_IP_CHANGED, "LP", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_SUSPENDED, "SUSP", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_RESUMED, "RESUME", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_BLK_CHANGED, "BLK", sb);
+        flags = maybeAppendDeclaredMethod(flags, CALLBACK_LOCAL_NETWORK_INFO_CHANGED,
+                "LOCALINF", sb);
+        if (flags != 0) {
+            sb.append("|0x").append(Integer.toHexString(flags));
+        }
+        return sb.toString();
+    }
+
+    private static int maybeAppendDeclaredMethod(int declaredMethodsFlags,
+            int callbackId, String callbackName, @NonNull StringBuilder builder) {
+        final int callbackFlag = 1 << callbackId;
+        if ((declaredMethodsFlags & callbackFlag) != 0) {
+            if (builder.length() > 0) {
+                builder.append('|');
+            }
+            builder.append(callbackName);
+        }
+        return declaredMethodsFlags & ~callbackFlag;
+    }
+
     // Keep backward compatibility since the ServiceSpecificException is used by
     // the API surface, see {@link ConnectivityManager#convertServiceException}.
     public static class RequestInfoPerUidCounter extends PerUidCounter {
@@ -9082,7 +9132,7 @@
             }
             networkAgent.networkMonitor().notifyLinkPropertiesChanged(
                     new LinkProperties(newLp, true /* parcelSensitiveFields */));
-            notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED);
+            notifyNetworkCallbacks(networkAgent, CALLBACK_IP_CHANGED);
         }
 
         mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent);
@@ -9578,8 +9628,7 @@
         if (prevSuspended != suspended) {
             // TODO (b/73132094) : remove this call once the few users of onSuspended and
             // onResumed have been removed.
-            notifyNetworkCallbacks(nai, suspended ? ConnectivityManager.CALLBACK_SUSPENDED
-                    : ConnectivityManager.CALLBACK_RESUMED);
+            notifyNetworkCallbacks(nai, suspended ? CALLBACK_SUSPENDED : CALLBACK_RESUMED);
         }
         if (prevSuspended != suspended || prevRoaming != roaming) {
             // updateNetworkInfo will mix in the suspended info from the capabilities and
@@ -9666,7 +9715,7 @@
             // If the requestable capabilities have changed or the score changed, we can't have been
             // called by rematchNetworkAndRequests, so it's safe to start a rematch.
             rematchAllNetworksAndRequests();
-            notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);
+            notifyNetworkCallbacks(nai, CALLBACK_CAP_CHANGED);
         }
         updateNetworkInfoForRoamingAndSuspended(nai, prevNc, newNc);
 
@@ -9808,7 +9857,7 @@
                 // But here there is no new request, so the rematch won't see anything. Send
                 // callbacks to apps now to tell them about the loss of upstream.
                 notifyNetworkCallbacks(nai,
-                        ConnectivityManager.CALLBACK_LOCAL_NETWORK_INFO_CHANGED);
+                        CALLBACK_LOCAL_NETWORK_INFO_CHANGED);
                 return;
             }
         }
@@ -10114,7 +10163,7 @@
 
     private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent,
             int notificationType) {
-        if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) {
+        if (notificationType == CALLBACK_AVAILABLE && !nri.mPendingIntentSent) {
             Intent intent = new Intent();
             intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network);
             // If apps could file multi-layer requests with PendingIntents, they'd need to know
@@ -10207,13 +10256,13 @@
         final NetworkRequest nrForCallback = nri.getNetworkRequestForCallback();
         putParcelable(bundle, nrForCallback);
         Message msg = Message.obtain();
-        if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL) {
+        if (notificationType != CALLBACK_UNAVAIL) {
             putParcelable(bundle, networkAgent.network);
         }
         final boolean includeLocationSensitiveInfo =
                 (nri.mCallbackFlags & NetworkCallback.FLAG_INCLUDE_LOCATION_INFO) != 0;
         switch (notificationType) {
-            case ConnectivityManager.CALLBACK_AVAILABLE: {
+            case CALLBACK_AVAILABLE: {
                 final NetworkCapabilities nc =
                         createWithLocationInfoSanitizedIfNecessaryWhenParceled(
                                 networkCapabilitiesRestrictedForCallerPermissions(
@@ -10232,11 +10281,11 @@
                 msg.arg1 = arg1;
                 break;
             }
-            case ConnectivityManager.CALLBACK_LOSING: {
+            case CALLBACK_LOSING: {
                 msg.arg1 = arg1;
                 break;
             }
-            case ConnectivityManager.CALLBACK_CAP_CHANGED: {
+            case CALLBACK_CAP_CHANGED: {
                 // networkAgent can't be null as it has been accessed a few lines above.
                 final NetworkCapabilities netCap =
                         networkCapabilitiesRestrictedForCallerPermissions(
@@ -10249,17 +10298,17 @@
                                 nri.mCallingAttributionTag));
                 break;
             }
-            case ConnectivityManager.CALLBACK_IP_CHANGED: {
+            case CALLBACK_IP_CHANGED: {
                 putParcelable(bundle, linkPropertiesRestrictedForCallerPermissions(
                         networkAgent.linkProperties, nri.mPid, nri.mUid));
                 break;
             }
-            case ConnectivityManager.CALLBACK_BLK_CHANGED: {
+            case CALLBACK_BLK_CHANGED: {
                 maybeLogBlockedStatusChanged(nri, networkAgent.network, arg1);
                 msg.arg1 = arg1;
                 break;
             }
-            case ConnectivityManager.CALLBACK_LOCAL_NETWORK_INFO_CHANGED: {
+            case CALLBACK_LOCAL_NETWORK_INFO_CHANGED: {
                 if (!networkAgent.isLocalNetwork()) {
                     Log.wtf(TAG, "Callback for local info for a non-local network");
                     return;
@@ -10528,7 +10577,7 @@
     private void processListenRequests(@NonNull final NetworkAgentInfo nai) {
         // For consistency with previous behaviour, send onLost callbacks before onAvailable.
         processNewlyLostListenRequests(nai);
-        notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);
+        notifyNetworkCallbacks(nai, CALLBACK_CAP_CHANGED);
         processNewlySatisfiedListenRequests(nai);
     }
 
@@ -10541,7 +10590,7 @@
             if (!nr.isListen()) continue;
             if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) {
                 nai.removeRequest(nr.requestId);
-                callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0);
+                callCallbackForRequest(nri, nai, CALLBACK_LOST, 0);
             }
         }
     }
@@ -10873,7 +10922,7 @@
                 notifyNetworkAvailable(event.mNewNetwork, event.mNetworkRequestInfo);
             } else {
                 callCallbackForRequest(event.mNetworkRequestInfo, event.mOldNetwork,
-                        ConnectivityManager.CALLBACK_LOST, 0);
+                        CALLBACK_LOST, 0);
             }
         }
 
@@ -10917,7 +10966,7 @@
         if (null != localInfoChangedAgents) {
             for (final NetworkAgentInfo nai : localInfoChangedAgents) {
                 notifyNetworkCallbacks(nai,
-                        ConnectivityManager.CALLBACK_LOCAL_NETWORK_INFO_CHANGED);
+                        CALLBACK_LOCAL_NETWORK_INFO_CHANGED);
             }
         }
 
@@ -10960,7 +11009,7 @@
         if (Objects.equals(nai.networkCapabilities, newNc)) return;
         updateNetworkPermissions(nai, newNc);
         nai.getAndSetNetworkCapabilities(newNc);
-        notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);
+        notifyNetworkCallbacks(nai, CALLBACK_CAP_CHANGED);
     }
 
     private void updateLegacyTypeTrackerAndVpnLockdownForRematch(
@@ -11329,7 +11378,7 @@
             rematchAllNetworksAndRequests();
 
             // This has to happen after matching the requests, because callbacks are just requests.
-            notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK);
+            notifyNetworkCallbacks(networkAgent, CALLBACK_PRECHECK);
         } else if (state == NetworkInfo.State.DISCONNECTED) {
             networkAgent.disconnect();
             if (networkAgent.isVPN()) {
@@ -11362,7 +11411,7 @@
     protected void notifyNetworkAvailable(NetworkAgentInfo nai, NetworkRequestInfo nri) {
         mHandler.removeMessages(EVENT_TIMEOUT_NETWORK_REQUEST, nri);
         if (nri.mPendingIntent != null) {
-            sendPendingIntentForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE);
+            sendPendingIntentForRequest(nri, nai, CALLBACK_AVAILABLE);
             // Attempt no subsequent state pushes where intents are involved.
             return;
         }
@@ -11370,14 +11419,14 @@
         final int blockedReasons = mUidBlockedReasons.get(nri.mAsUid, BLOCKED_REASON_NONE);
         final boolean metered = nai.networkCapabilities.isMetered();
         final boolean vpnBlocked = isUidBlockedByVpn(nri.mAsUid, mVpnBlockedUidRanges);
-        callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE,
+        callCallbackForRequest(nri, nai, CALLBACK_AVAILABLE,
                 getBlockedState(nri.mAsUid, blockedReasons, metered, vpnBlocked));
     }
 
     // Notify the requests on this NAI that the network is now lingered.
     private void notifyNetworkLosing(@NonNull final NetworkAgentInfo nai, final long now) {
         final int lingerTime = (int) (nai.getInactivityExpiry() - now);
-        notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime);
+        notifyNetworkCallbacks(nai, CALLBACK_LOSING, lingerTime);
     }
 
     private int getPermissionBlockedState(final int uid, final int reasons) {
@@ -11440,7 +11489,7 @@
             final int newBlockedState = getBlockedState(
                     nri.mAsUid, blockedReasons, newMetered, newVpnBlocked);
             if (oldBlockedState != newBlockedState) {
-                callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,
+                callCallbackForRequest(nri, nai, CALLBACK_BLK_CHANGED,
                         newBlockedState);
             }
         }
@@ -11467,7 +11516,7 @@
                 NetworkRequest nr = nai.requestAt(i);
                 NetworkRequestInfo nri = mNetworkRequests.get(nr);
                 if (nri != null && nri.mAsUid == uid) {
-                    callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,
+                    callCallbackForRequest(nri, nai, CALLBACK_BLK_CHANGED,
                             newBlockedState);
                 }
             }
diff --git a/tests/unit/java/com/android/server/connectivityservice/CSDeclaredMethodsForCallbacksTest.kt b/tests/unit/java/com/android/server/connectivityservice/CSDeclaredMethodsForCallbacksTest.kt
index cf990b1..a7083dc 100644
--- a/tests/unit/java/com/android/server/connectivityservice/CSDeclaredMethodsForCallbacksTest.kt
+++ b/tests/unit/java/com/android/server/connectivityservice/CSDeclaredMethodsForCallbacksTest.kt
@@ -17,8 +17,11 @@
 package com.android.server.connectivityservice
 
 import android.net.ConnectivityManager
+import android.net.ConnectivityManager.CALLBACK_AVAILABLE
+import android.net.ConnectivityManager.CALLBACK_BLK_CHANGED
 import android.net.ConnectivityManager.CALLBACK_CAP_CHANGED
 import android.net.ConnectivityManager.CALLBACK_IP_CHANGED
+import android.net.ConnectivityManager.CALLBACK_LOCAL_NETWORK_INFO_CHANGED
 import android.net.ConnectivityManager.CALLBACK_LOST
 import android.net.ConnectivityManager.NetworkCallback.DECLARED_METHODS_ALL
 import android.net.LinkAddress
@@ -35,7 +38,9 @@
 import com.android.testutils.RecorderCallback.CallbackEntry
 import com.android.testutils.TestableNetworkCallback
 import com.android.testutils.tryTest
+import java.lang.reflect.Modifier
 import java.util.concurrent.atomic.AtomicInteger
+import kotlin.test.assertEquals
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -129,6 +134,32 @@
         listenCb.expect<CallbackEntry.CapabilitiesChanged>()
         listenCb.assertNoCallback(timeoutMs = 0L)
     }
+
+    @Test
+    fun testDeclaredMethodsFlagsToString() {
+        assertEquals("NONE", ConnectivityService.declaredMethodsFlagsToString(0))
+        assertEquals("ALL", ConnectivityService.declaredMethodsFlagsToString(0.inv()))
+        assertEquals("AVAIL|NC|LP|BLK|LOCALINF", ConnectivityService.declaredMethodsFlagsToString(
+            (1 shl CALLBACK_AVAILABLE) or
+            (1 shl CALLBACK_CAP_CHANGED) or
+            (1 shl CALLBACK_IP_CHANGED) or
+            (1 shl CALLBACK_BLK_CHANGED) or
+            (1 shl CALLBACK_LOCAL_NETWORK_INFO_CHANGED)
+        ))
+
+        // EXPIRE_LEGACY_REQUEST (=8) is only used in ConnectivityManager and not included.
+        // CALLBACK_TRANSITIVE_CALLS_ONLY (=0) is not a callback so not included either.
+        assertEquals(
+            "PRECHK|AVAIL|LOSING|LOST|UNAVAIL|NC|LP|SUSP|RESUME|BLK|LOCALINF|0x7fffe101",
+            ConnectivityService.declaredMethodsFlagsToString(0x7fff_ffff)
+        )
+        // The toString method and the assertion above need to be updated if constants are added
+        val constants = ConnectivityManager::class.java.declaredFields.filter {
+            Modifier.isStatic(it.modifiers) && Modifier.isFinal(it.modifiers) &&
+                    it.name.startsWith("CALLBACK_")
+        }
+        assertEquals(12, constants.size)
+    }
 }
 
 private fun AtomicInteger.withFlags(vararg flags: Int, action: () -> Unit) {