라이브 메인 - UI, Api 적용

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

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <gradient
+        android:type="linear"
+        android:startColor="#cc000000"
+        android:endColor="#19000000"
+        android:angle="90" />
+</shape>