java: Implement keystore clearing for target packages during initialization

- Currently using keystore2 API.
- TODO: Add support for keystore1.

Signed-off-by: Dakkshesh <beakthoven@gmail.com>

stub/src/main/java/android/content/pm/IPackageManager.java

@@ -10,6 +10,10 @@ import android.os.IBinder;
 public interface IPackageManager {
     String[] getPackagesForUid(int uid);
 
+    ApplicationInfo getApplicationInfo(String packageName, int flags, int userId);
+
+    ApplicationInfo getApplicationInfo(String packageName, long flags, int userId);
+
     PackageInfo getPackageInfo(String packageName, long flags, int userId);
 
     PackageInfo getPackageInfo(String packageName, int flags, int userId);

stub/src/main/java/android/security/AndroidKeyStoreMaintenance.java

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2025 Dakkshesh <beakthoven@gmail.com>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package android.security;
+
+public class AndroidKeyStoreMaintenance {
+
+    public static int clearNamespace(int domain, long namespace) {
+        throw new RuntimeException("");
+    }
+}