Settings: Fix selinux status after About Phone revamp

 * convert to BasePreferenceController

Author: adithya2306

res/xml/firmware_version.xml

@@ -75,7 +75,7 @@
     <Preference
         android:key="selinux_status"
         android:title="@string/selinux_status"
-        android:summary="@string/selinux_status_enforcing"
+        android:summary="@string/unknown"
         settings:enableCopying="false"
         settings:controller="com.android.settings.deviceinfo.firmwareversion.SELinuxStatusPreferenceController"/>
 

src/com/android/settings/deviceinfo/firmwareversion/SELinuxStatusPreferenceController.java

@@ -17,48 +17,35 @@
 
 import android.content.Context;
 import android.os.SELinux;
-import android.os.SystemProperties;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceScreen;
-import android.text.TextUtils;
 
 import com.android.settings.R;
-import com.android.settings.core.PreferenceControllerMixin;
-import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settings.core.BasePreferenceController;
 
-public class SELinuxStatusPreferenceController extends AbstractPreferenceController implements
-        PreferenceControllerMixin {
+public class SELinuxStatusPreferenceController extends BasePreferenceController {
 
     private static final String KEY_SELINUX_STATUS = "selinux_status";
+    private static final String TAG = "SELinuxStatusPreferenceController";
 
-    public SELinuxStatusPreferenceController(Context context) {
-        super(context);
+    public SELinuxStatusPreferenceController(Context context, String key) {
+        super(context, key);
     }
 
     @Override
-    public boolean isAvailable() {
-        return true;
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
     }
 
     @Override
-    public String getPreferenceKey() {
-        return KEY_SELINUX_STATUS;
-    }
-
-    @Override
-    public void displayPreference(PreferenceScreen screen) {
-        super.displayPreference(screen);
-        final Preference pref = screen.findPreference(KEY_SELINUX_STATUS);
-        if (pref == null) {
-            return;
-        }
+    public CharSequence getSummary() {
         if (!SELinux.isSELinuxEnabled()) {
-            String status = mContext.getResources().getString(R.string.selinux_status_disabled);
-            pref.setSummary(status);
-        } else if (!SELinux.isSELinuxEnforced()) {
-            String status = mContext.getResources().getString(R.string.selinux_status_permissive);
-            pref.setSummary(status);
+            return mContext.getResources().getString(R.string.selinux_status_disabled);
+        } else if (SELinux.isSELinuxEnforced()) {
+            return mContext.getResources().getString(R.string.selinux_status_enforcing);
+        } else {
+            return mContext.getResources().getString(R.string.selinux_status_permissive);
         }
     }
-}
 
+}