android: don't show lock notice on first start (#3451)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/App.kt

@@ -65,7 +65,7 @@ fun MainScreen() {
       !chatModel.controller.appPrefs.laNoticeShown.get()
       && showAdvertiseLAAlert
       && chatModel.controller.appPrefs.onboardingStage.get() == OnboardingStage.OnboardingComplete
-      && chatModel.chats.isNotEmpty()
+      && chatModel.chats.count() > 1
       && chatModel.activeCallInvitation.value == null
     ) {
       AppLock.showLANotice(ChatModel.controller.appPrefs.laNoticeShown) }