Add tips for torrent download

app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryDetailScene.java

@@ -1903,9 +1903,11 @@ public class GalleryDetailScene extends CollapsingToolbarScene implements View.O
                 if (dm != null) {
                     try {
                         dm.enqueue(r);
+                        showTip(R.string.download_torrent_started, LENGTH_SHORT);
                     } catch (Throwable e) {
                         e.printStackTrace();
                         ExceptionUtils.throwIfFatal(e);
+                        showTip(R.string.download_torrent_failure, LENGTH_SHORT);
                     }
                 }
             }

app/src/main/res/values-zh-rCN/strings.xml

@@ -178,6 +178,8 @@
     <string name="rate_successfully">评分成功</string>
     <string name="rate_failed">评分失败</string>
     <string name="no_torrents">没有种子</string>
+    <string name="download_torrent_started">开始下载种子</string>
+    <string name="download_torrent_failure">无法下载种子</string>
     <string name="torrents">种子</string>
     <string name="favorited">已收藏</string>
     <string name="not_favorited">未收藏</string>

app/src/main/res/values/strings.xml

@@ -223,6 +223,8 @@
     <string name="rate_successfully">Rate successfully</string>
     <string name="rate_failed">Rate failed</string>
     <string name="no_torrents">No torrents</string>
+    <string name="download_torrent_started">Torrent download started</string>
+    <string name="download_torrent_failure">Failed to download torrent</string>
     <string name="torrents">Torrents</string>
     <string name="favorited">Favorited</string>
     <string name="not_favorited">Not favorited</string>