Replace targetSDK check with platform compat framework gating.

Define a new change id and use it for gating the change.

Test: atest -p cts/tests/signature, atest AndroidTestBaseUpdaterTest
Bug: 30188076
Change-Id: Ic8c85eae0c490a7eca117b74c4326dd50df2b352

Android.bp

@@ -426,7 +426,7 @@ java_library {
 
 java_library {
     name: "framework-annotation-proc",
-    defaults: ["framework-defaults"],
+    defaults: ["framework-aidl-export-defaults"],
     srcs: [":framework-all-sources"],
     installable: false,
     plugins: [

core/java/android/content/pm/AndroidTestBaseUpdater.java

@@ -18,10 +18,17 @@ package android.content.pm;
 import static android.content.pm.SharedLibraryNames.ANDROID_TEST_BASE;
 import static android.content.pm.SharedLibraryNames.ANDROID_TEST_RUNNER;
 
+import android.compat.annotation.ChangeId;
+import android.compat.annotation.EnabledAfter;
+import android.content.Context;
 import android.content.pm.PackageParser.Package;
 import android.os.Build;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.compat.IPlatformCompat;
 
 /**
  * Updates a package to ensure that if it targets <= Q that the android.test.base library is
@@ -37,10 +44,26 @@ import com.android.internal.annotations.VisibleForTesting;
  */
 @VisibleForTesting
 public class AndroidTestBaseUpdater extends PackageSharedLibraryUpdater {
+    private static final String TAG = "AndroidTestBaseUpdater";
 
-    private static boolean apkTargetsApiLevelLessThanOrEqualToQ(Package pkg) {
-        int targetSdkVersion = pkg.applicationInfo.targetSdkVersion;
-        return targetSdkVersion <= Build.VERSION_CODES.Q;
+    /**
+     * Remove android.test.base library for apps that target SDK R or more and do not depend on
+     * android.test.runner (as it depends on classes from the android.test.base library).
+     */
+    @ChangeId
+    @EnabledAfter(targetSdkVersion = Build.VERSION_CODES.Q)
+    private static final long REMOVE_ANDROID_TEST_BASE = 133396946L;
+
+    private static boolean isChangeEnabled(Package pkg) {
+        IPlatformCompat platformCompat = IPlatformCompat.Stub.asInterface(
+                ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE));
+        try {
+            return platformCompat.isChangeEnabled(REMOVE_ANDROID_TEST_BASE, pkg.applicationInfo);
+        } catch (RemoteException | NullPointerException e) {
+            Log.e(TAG, "Failed to get a response from PLATFORM_COMPAT_SERVICE", e);
+        }
+        // Fall back to previous behaviour.
+        return pkg.applicationInfo.targetSdkVersion <= Build.VERSION_CODES.Q;
     }
 
     @Override
@@ -48,7 +71,7 @@ public class AndroidTestBaseUpdater extends PackageSharedLibraryUpdater {
         // Packages targeted at <= Q expect the classes in the android.test.base library
         // to be accessible so this maintains backward compatibility by adding the
         // android.test.base library to those packages.
-        if (apkTargetsApiLevelLessThanOrEqualToQ(pkg)) {
+        if (!isChangeEnabled(pkg)) {
             prefixRequiredLibrary(pkg, ANDROID_TEST_BASE);
         } else {
             // If a package already depends on android.test.runner then add a dependency on