Pull SecureBox.java out into its own library.

SecureBox is needed by Settings for encrypting device credential and
was inaccessible from services/core/java/com/android/server.
Create a new SecureBox library to resolve.

Test: atest com.android.server.locksettings.recoverablekeystore
SecureBoxTests
Bug: 258505917

Change-Id: I65484edf12b04dfe1642cd0c97bc999d26430395
diff --git a/libs/securebox/tests/AndroidManifest.xml b/libs/securebox/tests/AndroidManifest.xml
new file mode 100644
index 0000000..3dc9563
--- /dev/null
+++ b/libs/securebox/tests/AndroidManifest.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2022 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.android.security.tests">
+
+    <application android:debuggable="true" android:largeHeap="true">
+        <uses-library android:name="android.test.mock" />
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:label="Tests for SecureBox"
+        android:targetPackage="com.android.security.tests">
+    </instrumentation>
+
+</manifest>