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/layout/item_channel.xml

@@ -3,7 +3,9 @@
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_margin="6dp"
-    android:background="@drawable/bg_channel_item"
+    android:background="@drawable/bg_channel_item_selector"
+    android:focusable="true"
+    android:focusableInTouchMode="true"
     android:gravity="center_horizontal"
     android:orientation="vertical"
     android:padding="16dp">