refactor(android): simplify MainActivity for Capacitor 6

- Remove manual plugin registration code
- Use standard BridgeActivity pattern
- Plugin registration now handled via capacitor.plugins.json
- Cleaner, more maintainable approach

android/app/src/main/java/com/timesafari/dailynotification/MainActivity.java

@@ -1,5 +1,11 @@
 package com.timesafari.dailynotification;
 
 import com.getcapacitor.BridgeActivity;
+import android.os.Bundle;
 
-public class MainActivity extends BridgeActivity {}
+public class MainActivity extends BridgeActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+}