refactor: simplify Android widget deep linking by directly launching … (#609)

* refactor: simplify Android widget deep linking by directly launching MainActivity

* refactor: address CodeRabbitAI review feedback for lifecycle, bounds checking, and encapsulation

* fix:properly configure deep-link routing context

Author: chan9an

android/app/src/main/AndroidManifest.xml

@@ -28,6 +28,10 @@
               android:name="io.flutter.embedding.android.NormalTheme"
               android:resource="@style/NormalTheme"
               />
+            <meta-data 
+              android:name="flutter_deeplinking_enabled" 
+              android:value="false" 
+              />
 
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>