Fixes more issues

app/src/main/java/org/linphone/LinphoneManager.java

@@ -314,15 +314,6 @@ public class LinphoneManager implements SensorEventListener {
 
     private void destroyCore() {
         Log.w("[Manager] Destroying Core");
-        if (LinphonePreferences.instance() != null) {
-            // We set network reachable at false before destroying the Core
-            // to not send a register with expires at 0
-            if (LinphonePreferences.instance().isPushNotificationEnabled()) {
-                Log.w(
-                        "[Manager] Setting network reachability to False to prevent unregister and allow incoming push notifications");
-                mCore.setNetworkReachable(false);
-            }
-        }
         mCore.stop();
         mCore.removeListener(mCoreListener);
     }

app/src/main/java/org/linphone/activities/MainActivity.java

@@ -559,6 +559,7 @@ public abstract class MainActivity extends LinphoneGenericActivity
                     if (LinphoneContext.isReady()) {
                         ContactsManager.getInstance().enableContactsAccess();
                         ContactsManager.getInstance().initializeContactManager();
+                        ContactsManager.getInstance().fetchContactsAsync();
                     }
                 }
             } else if (permissions[i].equals(Manifest.permission.READ_EXTERNAL_STORAGE)) {

app/src/main/java/org/linphone/call/CallActivity.java

@@ -1122,7 +1122,8 @@ public class CallActivity extends LinphoneGenericActivity
                 if (mCore.isInConference()) {
                     displayConferenceCall(call);
                     conferenceDisplayed = true;
-                } else if (!pausedConferenceDisplayed) {
+                } else if (!pausedConferenceDisplayed
+                        && mCore.getCallsNb() > 1) { // Workaround for temporary SDK issue
                     displayPausedConference();
                     pausedConferenceDisplayed = true;
                 }

app/src/main/java/org/linphone/contacts/ContactsFragment.java

@@ -216,6 +216,7 @@ public class ContactsFragment extends Fragment
     @Override
     public void onResume() {
         super.onResume();
+
         ContactsManager.getInstance().addContactsListener(this);
 
         mOnlyDisplayLinphoneContacts =
@@ -224,6 +225,7 @@ public class ContactsFragment extends Fragment
 
         changeContactsToggle();
         invalidate();
+        onContactsUpdated();
 
         ((ContactsActivity) (getActivity())).showTabBar();
     }

app/src/main/java/org/linphone/service/LinphoneService.java

@@ -107,11 +107,6 @@ public final class LinphoneService extends Service {
             if (core != null) {
                 core.terminateAllCalls();
             }
-
-            // If push is enabled, don't unregister account, otherwise do unregister
-            if (LinphonePreferences.instance().isPushNotificationEnabled()) {
-                if (core != null) core.setNetworkReachable(false);
-            }
             stopSelf();
         }
         super.onTaskRemoved(rootIntent);