Remove NSD_ON setting

NSD_ON setting has never been set since it created. The
NsdService is the only user which read/write the setting.
However, NsdManager cts test must running with nsd service
enabled that means this setting should be enabled
always. And this setting is the hidden symbols that
NsdService can't use it after move to mainline module. Thus,
remove this useless setting.

Bug: 206702844
Test: m
Change-Id: Idb5dfc71ebfe2eacd476dd8646aad9adc4975149

core/java/android/provider/Settings.java

@@ -5756,7 +5756,6 @@ public final class Settings {
             MOVED_TO_GLOBAL.add(Settings.Global.CONNECTIVITY_CHANGE_DELAY);
             MOVED_TO_GLOBAL.add(Settings.Global.CAPTIVE_PORTAL_DETECTION_ENABLED);
             MOVED_TO_GLOBAL.add(Settings.Global.CAPTIVE_PORTAL_SERVER);
-            MOVED_TO_GLOBAL.add(Settings.Global.NSD_ON);
             MOVED_TO_GLOBAL.add(Settings.Global.SET_INSTALL_LOCATION);
             MOVED_TO_GLOBAL.add(Settings.Global.DEFAULT_INSTALL_LOCATION);
             MOVED_TO_GLOBAL.add(Settings.Global.INET_CONDITION_DEBOUNCE_UP_DELAY);
@@ -12631,13 +12630,6 @@ public final class Settings {
         @Readable
         public static final String MIN_DURATION_BETWEEN_RECOVERY_STEPS_IN_MS =
                 "min_duration_between_recovery_steps";
-        /**
-         * Whether network service discovery is enabled.
-         *
-         * @hide
-         */
-        @Readable
-        public static final String NSD_ON = "nsd_on";
 
         /**
          * Let user pick default install location.

core/proto/android/providers/settings/global.proto

@@ -716,8 +716,6 @@ message GlobalSettingsProto {
 
     optional SettingProto nr_nsa_tracking_screen_off_mode = 153 [ (android.privacy).dest = DEST_AUTOMATIC ];
 
-    optional SettingProto nsd_on = 83 [ (android.privacy).dest = DEST_AUTOMATIC ];
-
     message Ntp {
         option (android.msg_privacy).dest = DEST_EXPLICIT;
 

packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java

@@ -1348,7 +1348,6 @@ class DatabaseHelper extends SQLiteOpenHelper {
                             Settings.Global.CONNECTIVITY_CHANGE_DELAY,
                             Settings.Global.CAPTIVE_PORTAL_DETECTION_ENABLED,
                             Settings.Global.CAPTIVE_PORTAL_SERVER,
-                            Settings.Global.NSD_ON,
                             Settings.Global.SET_INSTALL_LOCATION,
                             Settings.Global.DEFAULT_INSTALL_LOCATION,
                             Settings.Global.INET_CONDITION_DEBOUNCE_UP_DELAY,

packages/SettingsProvider/src/com/android/providers/settings/SettingsProtoDumpUtil.java

@@ -1114,10 +1114,6 @@ class SettingsProtoDumpUtil {
                 GlobalSettingsProto.Notification.SMART_SUGGESTIONS_IN_NOTIFICATIONS_FLAGS);
         p.end(notificationToken);
 
-        dumpSetting(s, p,
-                Settings.Global.NSD_ON,
-                GlobalSettingsProto.NSD_ON);
-
         dumpSetting(s, p,
                 Settings.Global.NR_NSA_TRACKING_SCREEN_OFF_MODE,
                 GlobalSettingsProto.NR_NSA_TRACKING_SCREEN_OFF_MODE);

packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java

@@ -394,7 +394,6 @@ public class SettingsBackupTest {
                     Settings.Global.NOTIFICATION_SNOOZE_OPTIONS,
                     Settings.Global.NOTIFICATION_FEEDBACK_ENABLED,
                     Settings.Global.NR_NSA_TRACKING_SCREEN_OFF_MODE,
-                    Settings.Global.NSD_ON,
                     Settings.Global.NTP_SERVER,
                     Settings.Global.NTP_TIMEOUT,
                     Settings.Global.OTA_DISABLE_AUTOMATIC_UPDATE,