catch and show exceptions thrown at adding message attachments

app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt

@@ -514,9 +514,13 @@ class ThreadActivity : SimpleActivity() {
 
         if (attachmentUris.isNotEmpty()) {
             for (uri in attachmentUris) {
+                try {
                     val byteArray = contentResolver.openInputStream(uri)?.readBytes() ?: continue
                     val mimeType = contentResolver.getType(uri) ?: continue
                     message.addMedia(byteArray, mimeType)
+                } catch (e: Exception) {
+                    showErrorToast(e)
+                }
             }
         }