add cmd: joint video together

joint video together

app/src/main/res/layout/activity_video_handle.xml

@@ -116,6 +116,13 @@
                 android:layout_marginTop="4dp"
                 android:text="@string/video_pip"/>
 
+            <Button
+                android:id="@+id/btn_joint"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:text="@string/video_joint"/>
+
             <Button
                 android:id="@+id/btn_moov"
                 android:layout_width="wrap_content"

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

@@ -42,6 +42,7 @@
     <string name="video_pip">Video Pip</string>
     <string name="video_preview">Video preview</string>
     <string name="video_moov">MOOV move ahead</string>
+    <string name="video_joint">Video joint</string>
 
     <string name="swap">Swap</string>
     <string name="start">Start</string>

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

@@ -42,6 +42,7 @@
     <string name="video_pip">视频画中画</string>
     <string name="video_preview">播放预览</string>
     <string name="video_moov">MOOV前移</string>
+    <string name="video_joint">视频拼接</string>
 
     <string name="swap">切换</string>
     <string name="start">开始</string>