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/java/com/streamplayer/ChannelAdapter.java

@@ -43,6 +43,10 @@ public class ChannelAdapter extends RecyclerView.Adapter<ChannelAdapter.ChannelV
                 listener.onChannelClick(channel);
             }
         });
+        holder.itemView.setOnFocusChangeListener((v, hasFocus) -> {
+            float scale = hasFocus ? 1.08f : 1f;
+            v.animate().scaleX(scale).scaleY(scale).setDuration(120).start();
+        });
     }
 
     @Override

app/src/main/java/com/streamplayer/MainActivity.java

@@ -15,7 +15,8 @@ public class MainActivity extends AppCompatActivity {
         setContentView(R.layout.activity_main);
 
         RecyclerView recyclerView = findViewById(R.id.channel_grid);
-        recyclerView.setLayoutManager(new GridLayoutManager(this, 3));
+        recyclerView.setLayoutManager(new GridLayoutManager(this, getSpanCount()));
+        recyclerView.setHasFixedSize(true);
         ChannelAdapter adapter = new ChannelAdapter(
                 ChannelRepository.getChannels(),
                 channel -> {
@@ -25,5 +26,10 @@ public class MainActivity extends AppCompatActivity {
                     startActivity(intent);
                 });
         recyclerView.setAdapter(adapter);
+        recyclerView.post(recyclerView::requestFocus);
+    }
+
+    private int getSpanCount() {
+        return getResources().getInteger(R.integer.channel_grid_span);
     }
 }