Android TV v9.0 Final - Enhanced Section-Based Layout

Android TV Enhancements:
- SectionAdapter.java: New section-based content organization
- Enhanced MainActivity with improved section management
- Optimized ChannelAdapter for better TV navigation
- Modernized activity_main.xml with section layout
- Professional color scheme for Android TV
- Updated strings for better TV experience

New UI Components:
- bg_section_indicator.xml: Visual section indicators
- item_section.xml: Section-based layout structure
- color/**: State-aware colors for TV focus states
- Enhanced focus management for D-pad navigation

Technical Improvements:
- Better memory management with section-based loading
- Improved RecyclerView performance
- Enhanced visual feedback for TV remote control
- Professional color palette optimized for TV screens
- Consistent design language throughout app

All v8.0 features maintained:
- Audio background fix (onStop() lifecycle)
- Real-time events with Argentina timezone
- Alphabetical channel sorting
- DNS bypass for global access
- Tab navigation (Channels/Events)
- Complete Android TV optimization

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

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

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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true"><shape android:shape="rectangle"><solid android:color="#202020"/></shape></item>
+    <item android:state_focused="true"><shape android:shape="rectangle"><solid android:color="#303030"/></shape></item>
+    <item><shape android:shape="rectangle"><solid android:color="@android:color/transparent"/></shape></item>
+</selector>