Add Android TV Edition support

- Update AndroidManifest.xml for TV compatibility
- Add ChannelAdapter with D-pad navigation support
- Update MainActivity for TV UI optimization
- Add Android TV specific resources:
  - banner_streamplayer.xml for TV launcher
  - bg_channel_item_selector for focus states
  - values-sw720dp for large screens
  - integers.xml for TV configurations
- Update item_channel.xml for TV navigation
- Remove unused mobile-specific drawable

Features:
- Android TV Leanback support
- D-pad navigation optimization
- TV-optimized layouts and focus management
- Large screen resources for TV displays

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

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

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle">
+            <gradient
+                android:angle="0"
+                android:endColor="#FF002766"
+                android:startColor="#FF0F4C81" />
+            <corners android:radius="8dp" />
+        </shape>
+    </item>
+    <item>
+        <bitmap
+            android:antialias="true"
+            android:gravity="center"
+            android:src="@mipmap/ic_launcher" />
+    </item>
+</layer-list>

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

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
-    <solid android:color="#33212121" />
-    <corners android:radius="12dp" />
-    <stroke
-        android:width="1dp"
-        android:color="#55FFFFFF" />
-</shape>

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

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_focused="true">
+        <shape android:shape="rectangle">
+            <solid android:color="#66FFFFFF" />
+            <corners android:radius="16dp" />
+            <stroke
+                android:width="2dp"
+                android:color="#FFFFFFFF" />
+        </shape>
+    </item>
+    <item android:state_pressed="true">
+        <shape android:shape="rectangle">
+            <solid android:color="#55FFFFFF" />
+            <corners android:radius="16dp" />
+            <stroke
+                android:width="2dp"
+                android:color="#FFFFFFFF" />
+        </shape>
+    </item>
+    <item>
+        <shape android:shape="rectangle">
+            <solid android:color="#33212121" />
+            <corners android:radius="16dp" />
+            <stroke
+                android:width="1dp"
+                android:color="#55FFFFFF" />
+        </shape>
+    </item>
+</selector>