Enable URL-previews for notices

Desktop has those too.

CHANGES.md

@@ -2,7 +2,7 @@ Changes in Element 1.0.14 (2020-XX-XX)
 ===================================================
 
 Features ✨:
- -
+ - Enable url previews for notices (#2562)
 
 Improvements 🙌:
  -

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/media/UrlsExtractor.kt

@@ -32,7 +32,9 @@ internal class UrlsExtractor @Inject constructor() {
         return event.takeIf { it.getClearType() == EventType.MESSAGE }
                 ?.getClearContent()
                 ?.toModel<MessageContent>()
-                ?.takeIf { it.msgType == MessageType.MSGTYPE_TEXT || it.msgType == MessageType.MSGTYPE_EMOTE }
+                ?.takeIf { it.msgType == MessageType.MSGTYPE_TEXT ||
+                        it.msgType == MessageType.MSGTYPE_NOTICE ||
+                        it.msgType == MessageType.MSGTYPE_EMOTE }
                 ?.body
                 ?.let { urlRegex.findAll(it) }
                 ?.map { it.value }

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MessageItemFactory.kt

@@ -512,6 +512,9 @@ class MessageItemFactory @Inject constructor(
 
         return MessageTextItem_()
                 .leftGuideline(avatarSizeProvider.leftGuideline)
+                .previewUrlRetriever(callback?.getPreviewUrlRetriever())
+                .imageContentRenderer(imageContentRenderer)
+                .previewUrlCallback(callback)
                 .attributes(attributes)
                 .message(message)
                 .highlighted(highlight)