diff --git a/core/api/current.txt b/core/api/current.txt
index e513bba57f9f9..7c44aef83b318 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -30707,6 +30707,7 @@ package android.os {
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectCustomSlowCalls();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectDiskReads();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectDiskWrites();
+    method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectExplicitGc();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectNetwork();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectResourceMismatches();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectUnbufferedIo();
@@ -30721,6 +30722,7 @@ package android.os {
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitCustomSlowCalls();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitDiskReads();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitDiskWrites();
+    method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitExplicitGc();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitNetwork();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitResourceMismatches();
     method @NonNull public android.os.StrictMode.ThreadPolicy.Builder permitUnbufferedIo();
@@ -31260,6 +31262,9 @@ package android.os.strictmode {
   public final class DiskWriteViolation extends android.os.strictmode.Violation {
   }
 
+  public final class ExplicitGcViolation extends android.os.strictmode.Violation {
+  }
+
   public final class FileUriExposedViolation extends android.os.strictmode.Violation {
   }
 
diff --git a/core/api/test-current.txt b/core/api/test-current.txt
index 51ecd4cc61c6b..77092bc2ecb6a 100644
--- a/core/api/test-current.txt
+++ b/core/api/test-current.txt
@@ -1737,10 +1737,6 @@ package android.os {
     method public static void setViolationLogger(android.os.StrictMode.ViolationLogger);
   }
 
-  public static final class StrictMode.ThreadPolicy.Builder {
-    method @NonNull public android.os.StrictMode.ThreadPolicy.Builder detectExplicitGc();
-  }
-
   public static final class StrictMode.ViolationInfo implements android.os.Parcelable {
     ctor public StrictMode.ViolationInfo(android.os.Parcel);
     ctor public StrictMode.ViolationInfo(android.os.Parcel, boolean);
@@ -1959,13 +1955,6 @@ package android.os.storage {
 
 }
 
-package android.os.strictmode {
-
-  public final class ExplicitGcViolation extends android.os.strictmode.Violation {
-  }
-
-}
-
 package android.os.vibrator {
 
   public final class PrebakedSegment extends android.os.vibrator.VibrationEffectSegment {
diff --git a/core/java/android/os/StrictMode.java b/core/java/android/os/StrictMode.java
index 983a0aa363ce0..cfd26909a298e 100644
--- a/core/java/android/os/StrictMode.java
+++ b/core/java/android/os/StrictMode.java
@@ -26,6 +26,9 @@ import android.annotation.TestApi;
 import android.app.ActivityManager;
 import android.app.ActivityThread;
 import android.app.IActivityManager;
+import android.app.compat.CompatChanges;
+import android.compat.annotation.ChangeId;
+import android.compat.annotation.EnabledSince;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -348,6 +351,13 @@ public final class StrictMode {
     public static final int NETWORK_POLICY_LOG = 1;
     /** {@hide} */
     public static final int NETWORK_POLICY_REJECT = 2;
+  
+    /**
+     * Detect explicit calls to {@link Runtime#gc()}.
+     */
+    @ChangeId
+    @EnabledSince(targetSdkVersion = Build.VERSION_CODES.UPSIDE_DOWN_CAKE)
+    static final long DETECT_EXPLICIT_GC = 3400644L;
 
     // TODO: wrap in some ImmutableHashMap thing.
     // Note: must be before static initialization of sVmPolicy.
@@ -500,6 +510,7 @@ public final class StrictMode {
              * <p>As of the Gingerbread release this includes network and disk operations but will
              * likely expand in future releases.
              */
+            @SuppressWarnings("AndroidFrameworkCompatChange")
             public @NonNull Builder detectAll() {
                 detectDiskReads();
                 detectDiskWrites();
@@ -515,6 +526,9 @@ public final class StrictMode {
                 if (targetSdk >= Build.VERSION_CODES.O) {
                     detectUnbufferedIo();
                 }
+                if (CompatChanges.isChangeEnabled(DETECT_EXPLICIT_GC)) {
+                    detectExplicitGc();
+                }
                 return this;
             }
 
@@ -595,26 +609,16 @@ public final class StrictMode {
             }
 
             /**
-             * Detect explicit GC requests, i.e. calls to Runtime.gc().
-             *
-             * @hide
+             * Detect calls to {@link Runtime#gc()}.
              */
-            @TestApi
             public @NonNull Builder detectExplicitGc() {
-                // TODO(b/3400644): Un-hide this for next API update
-                // TODO(b/3400644): Un-hide ExplicitGcViolation for next API update
-                // TODO(b/3400644): Make DETECT_EXPLICIT_GC a @TestApi for next API update
-                // TODO(b/3400644): Call this from detectAll in next API update
                 return enable(DETECT_THREAD_EXPLICIT_GC);
             }
 
             /**
-             * Disable detection of explicit GC requests, i.e. calls to Runtime.gc().
-             *
-             * @hide
+             * Disable detection of calls to {@link Runtime#gc()}.
              */
             public @NonNull Builder permitExplicitGc() {
-                // TODO(b/3400644): Un-hide this for next API update
                 return disable(DETECT_THREAD_EXPLICIT_GC);
             }
 
diff --git a/core/java/android/os/strictmode/ExplicitGcViolation.java b/core/java/android/os/strictmode/ExplicitGcViolation.java
index 583ed1ab4505c..c4ae82ddbc051 100644
--- a/core/java/android/os/strictmode/ExplicitGcViolation.java
+++ b/core/java/android/os/strictmode/ExplicitGcViolation.java
@@ -19,10 +19,7 @@ import android.annotation.TestApi;
 
 /**
  * See #{@link android.os.StrictMode.ThreadPolicy.Builder#detectExplicitGc()}.
- *
- * @hide
  */
-@TestApi
 public final class ExplicitGcViolation extends Violation {
     /** @hide */
     public ExplicitGcViolation() {