修改学生端直播页面UI

student/src/main/res/drawable/bg_gray_20dp_shape.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
     <corners android:radius="19.5dp"/>
-    <solid android:color="@color/color_52000000"/>
+    <solid android:color="@color/color_25333333"/>
 </shape>

student/src/main/res/drawable/shape_live_msg_text_bg.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
-    <solid android:color="@color/color_52000000" />
+    <solid android:color="@color/color_25333333" />
     <corners android:radius="10dp" />
 </shape>