Settings: add abstract fragment class to reduce fragments boilerplate

Change-Id: I7abc1f6a59419eecb5c6616a66e12e524d2af1a1
Signed-off-by: rmp22 <195054967+rmp22@users.noreply.github.com>

src/com/android/settings/preferences/BasePreferenceFragment.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2025 AxionOS 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 com.android.settings.preferences
+
+import android.os.Bundle
+import androidx.annotation.XmlRes
+import com.android.internal.logging.nano.MetricsProto
+import com.android.settings.SettingsPreferenceFragment
+import com.android.settings.search.BaseSearchIndexProvider
+import com.android.settings.search.SearchIndexProviderHolder
+
+abstract class BasePreferenceFragment(
+    @XmlRes private val prefResId: Int
+) : SettingsPreferenceFragment(), SearchIndexProviderHolder {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        addPreferencesFromResource(prefResId)
+    }
+
+    override fun getMetricsCategory(): Int = MetricsProto.MetricsEvent.VIEW_UNKNOWN
+
+    override fun getSearchIndexProvider(): BaseSearchIndexProvider {
+        return object : BaseSearchIndexProvider(prefResId) {}
+    }
+}