新增 高亮焦点 为 Android TV 模式（首页- 书架/发现/订阅/我的）；

app/src/main/res/drawable/bg_item_focused_on_tv.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@color/btn_bg_press" android:state_focused="true" />
+</selector>

app/src/main/res/drawable/bg_prefs_color.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:state_pressed="true" android:drawable="@color/btn_bg_press" />
+    <item android:drawable="@color/btn_bg_press" android:state_focused="true" />
+    <item android:drawable="@color/btn_bg_press" android:state_pressed="true" />
 </selector>