add: discard record

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

@@ -168,12 +168,12 @@
                 android:layout_width="30dp"
                 android:layout_height="30dp"
                 android:layout_marginRight="8dp"
-                android:src="@drawable/discard"/>
+                android:src="@drawable/ic_close_white_24dp"/>
 
             <TextView
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:text="@string/text_stop_record"
+                android:text="@string/text_discard_record"
                 android:textColor="@android:color/primary_text_dark"
                 android:textSize="16sp"/>
 

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

@@ -206,6 +206,7 @@
     <string name="hint_loop_delay">延迟多少秒后开始循环</string>
     <string name="text_number_format_error">格式错误</string>
     <string name="text_accessibility_settings">打开无障碍服务</string>
+    <string name="text_discard_record">放弃录制</string>
 
     <string-array name="record_control_keys">
         <item>无</item>