Cherish: Add navbar layout inversion tuning [2/2]

Signed-off-by: Hưng Phan <phandinhhungvp2001@gmail.com>

res/values/cherish_strings.xml

@@ -197,5 +197,8 @@
     <string name="network_options_title">Options</string>
     <string name="network_traffic_autohide_title">Hide network traffic indicator if inactive</string>
     <string name="network_traffic_autohide_summary">Hide when network traffic indicator is below 1 KB/s</string>
+	
+	<!-- NavBar Inverse -->
+    <string name="navigation_bar_inverse_title">Invert 3 button navigation bar</string>
 
 </resources>

res/xml/cherish_settings_button.xml

@@ -17,6 +17,12 @@
         xmlns:android="http://schemas.android.com/apk/res/android"
         android:title="@string/button_title"
         xmlns:settings="http://schemas.android.com/apk/res/com.android.settings">
+		
+	<com.cherish.settings.preferences.SystemSettingSwitchPreference
+            android:key="navigation_bar_inverse"
+            android:title="@string/navigation_bar_inverse_title"
+            android:defaultValue="0"
+            settings:controller="com.cherish.settings.fragments.NavBarInversePreferenceController" />
 
 
 </PreferenceScreen>

src/com/cherish/settings/fragments/NavBarInversePreferenceController.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2022 PixelPlusUI 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.cherish.settings.fragments
+
+import android.content.Context
+import android.os.UserHandle
+import android.provider.Settings
+
+import com.cherish.settings.CherishBasePreferenceController
+
+class NavBarInversePreferenceController(
+    context: Context,
+    key: String,
+): CherishBasePreferenceController(context, key) {
+
+    override fun getAvailabilityStatus(): Int {
+        val threeButtonMode = Settings.Secure.getIntForUser(
+            mContext.contentResolver,
+            Settings.Secure.NAVIGATION_MODE,
+            0,
+            UserHandle.USER_CURRENT,
+        ) == 0
+        return if (threeButtonMode)
+            AVAILABLE
+        else
+            DISABLED_DEPENDENT_SETTING
+    }
+}