use DND instead of XA when phone is silent

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java

@@ -682,7 +682,7 @@ public class XmppConnectionService extends Service {
 					sendReadMarker(c);
 					break;
 				case AudioManager.RINGER_MODE_CHANGED_ACTION:
-					if (xaOnSilentMode()) {
+					if (dndOnSilentMode()) {
 						refreshAllPresences();
 					}
 					break;
@@ -860,8 +860,8 @@ public class XmppConnectionService extends Service {
 		}
 	}
 
-	private boolean xaOnSilentMode() {
+	private boolean dndOnSilentMode() {
-		return getPreferences().getBoolean("xa_on_silent_mode", false);
+		return getPreferences().getBoolean(SettingsActivity.DND_ON_SILENT_MODE, getResources().getBoolean(R.bool.dnd_on_silent_mode));
 	}
 
 	private boolean manuallyChangePresence() {
@@ -869,7 +869,7 @@ public class XmppConnectionService extends Service {
 	}
 
 	private boolean treatVibrateAsSilent() {
-		return getPreferences().getBoolean(SettingsActivity.TREAT_VIBRATE_AS_SILENT, false);
+		return getPreferences().getBoolean(SettingsActivity.TREAT_VIBRATE_AS_SILENT, getResources().getBoolean(R.bool.treat_vibrate_as_silent));
 	}
 
 	private boolean awayWhenScreenOff() {
@@ -881,8 +881,8 @@ public class XmppConnectionService extends Service {
 	}
 
 	private Presence.Status getTargetPresence() {
-		if (xaOnSilentMode() && isPhoneSilenced()) {
+		if (dndOnSilentMode() && isPhoneSilenced()) {
-			return Presence.Status.XA;
+			return Presence.Status.DND;
 		} else if (awayWhenScreenOff() && !isInteractive()) {
 			return Presence.Status.AWAY;
 		} else {

src/main/java/eu/siacs/conversations/ui/SettingsActivity.java

@@ -42,6 +42,7 @@ public class SettingsActivity extends XmppActivity implements
 	public static final String KEEP_FOREGROUND_SERVICE = "enable_foreground_service";
 	public static final String AWAY_WHEN_SCREEN_IS_OFF = "away_when_screen_off";
 	public static final String TREAT_VIBRATE_AS_SILENT = "treat_vibrate_as_silent";
+	public static final String DND_ON_SILENT_MODE = "dnd_on_silent_mode";
 	public static final String MANUALLY_CHANGE_PRESENCE = "manually_change_presence";
 	public static final String BLIND_TRUST_BEFORE_VERIFICATION = "btbv";
 	public static final String AUTOMATIC_MESSAGE_DELETION = "automatic_message_deletion";
@@ -332,7 +333,7 @@ public class SettingsActivity extends XmppActivity implements
 	public void onSharedPreferenceChanged(SharedPreferences preferences, String name) {
 		final List<String> resendPresence = Arrays.asList(
 				"confirm_messages",
-				"xa_on_silent_mode",
+				DND_ON_SILENT_MODE,
 				AWAY_WHEN_SCREEN_IS_OFF,
 				"allow_message_correction",
 				TREAT_VIBRATE_AS_SILENT,

src/main/res/values/defaults.xml

@@ -5,4 +5,6 @@
     <bool name="enter_is_send">false</bool>
     <bool name="notifications_from_strangers">false</bool>
     <bool name="headsup_notifications">false</bool>
+    <bool name="dnd_on_silent_mode">false</bool>
+    <bool name="treat_vibrate_as_silent">false</bool>
 </resources>

src/main/res/values/strings.xml

@@ -558,10 +558,10 @@
 	<string name="pref_presence_settings">Presence</string>
 	<string name="pref_away_when_screen_off">Away when screen is off</string>
 	<string name="pref_away_when_screen_off_summary">Marks your resource as away when the screen is turned off</string>
-	<string name="pref_xa_on_silent_mode">Not available in silent mode</string>
+	<string name="pref_dnd_on_silent_mode">“Do not disturb” in silent mode</string>
-	<string name="pref_xa_on_silent_mode_summary">Marks your resource as not available when device is in silent mode</string>
+	<string name="pref_dnd_on_silent_mode_summary">Marks your resource as “Do not disturb” when device is in silent mode</string>
 	<string name="pref_treat_vibrate_as_silent">Treat vibrate as silent mode</string>
-	<string name="pref_treat_vibrate_as_silent_summary">Marks your resource as not available when device is on vibrate</string>
+	<string name="pref_treat_vibrate_as_dnd_summary">Marks your resource as “Do not disturb” when device is on vibrate</string>
 	<string name="pref_show_connection_options">Extended connection settings</string>
 	<string name="pref_show_connection_options_summary">Show hostname and port settings when setting up an account</string>
 	<string name="hostname_example">xmpp.example.com</string>

src/main/res/xml/preferences.xml

@@ -256,17 +256,17 @@
                     android:title="@string/pref_away_when_screen_off"
                     android:dependency="manually_change_presence"/>
                 <CheckBoxPreference
-                    android:defaultValue="false"
+                    android:defaultValue="@bool/dnd_on_silent_mode"
-                    android:key="xa_on_silent_mode"
+                    android:key="dnd_on_silent_mode"
-                    android:summary="@string/pref_xa_on_silent_mode_summary"
+                    android:summary="@string/pref_dnd_on_silent_mode_summary"
-                    android:title="@string/pref_xa_on_silent_mode"
+                    android:title="@string/pref_dnd_on_silent_mode"
                     android:dependency="manually_change_presence"/>
                 <CheckBoxPreference
-                    android:dependency="xa_on_silent_mode"
+                    android:dependency="dnd_on_silent_mode"
-                    android:defaultValue="false"
+                    android:defaultValue="@bool/treat_vibrate_as_silent"
                     android:key="treat_vibrate_as_silent"
                     android:title="@string/pref_treat_vibrate_as_silent"
-                    android:summary="@string/pref_treat_vibrate_as_silent_summary"/>
+                    android:summary="@string/pref_treat_vibrate_as_dnd_summary"/>
             </PreferenceCategory>
             <PreferenceCategory android:title="@string/pref_expert_options_other">
                 <CheckBoxPreference