Update namespace for Preference testutils

Use unique namespace for each module.

Bug: 370394101
Flag: EXEMPT testutils
Test: m SettingsLibPreference-testutils
Change-Id: I01679b1752989e08fffa2f6bc25720aea4d153cd
diff --git a/packages/SettingsLib/Preference/Android.bp b/packages/SettingsLib/Preference/Android.bp
index e83e17c..bff95ce 100644
--- a/packages/SettingsLib/Preference/Android.bp
+++ b/packages/SettingsLib/Preference/Android.bp
@@ -1,3 +1,19 @@
+//
+// Copyright (C) 2024 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.
+//
+
 package {
     default_applicable_licenses: ["frameworks_base_license"],
 }
@@ -22,16 +38,3 @@
     ],
     kotlincflags: ["-Xjvm-default=all"],
 }
-
-android_library {
-    name: "SettingsLibPreference-testutils",
-    srcs: ["testutils/**/*.kt"],
-    static_libs: [
-        "SettingsLibPreference",
-        "androidx.fragment_fragment-testing",
-        "androidx.test.core",
-        "androidx.test.ext.junit",
-        "flag-junit",
-        "truth",
-    ],
-}