android: Stickers fix (#1449)

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

apps/android/app/src/main/java/chat/simplex/app/MainActivity.kt

@@ -374,15 +374,6 @@ fun MainPage(
                       }
                     }
                 }
-                launch {
-                  snapshotFlow { chatModel.sharedContent.value }
-                    .distinctUntilChanged()
-                    .filter { it != null }
-                    .collect {
-                      chatModel.chatId.value = null
-                      currentChatId = null
-                    }
-                }
               }
               Box (Modifier.graphicsLayer { translationX = maxWidth.toPx() - offset.value.dp.toPx() }) Box2@ {
                 currentChatId?.let {

apps/android/app/src/main/java/chat/simplex/app/views/chat/ComposeView.kt

@@ -541,6 +541,9 @@ fun ComposeView(
   }
 
   LaunchedEffect(chatModel.sharedContent.value) {
+    // Important. If it's null, don't do anything, chat is not closed yet but will be after a moment
+    if (chatModel.chatId.value == null) return@LaunchedEffect
+
     when (val shared = chatModel.sharedContent.value) {
       is SharedContent.Text -> onMessageChange(shared.text)
       is SharedContent.Images -> processPickedImage(shared.uris, shared.text)