feat: complete android test app setup

- Create missing capacitor-cordova-android-plugins directory and build files
- Add cordova.variables.gradle with proper variable definitions
- Create www directory with functional test web app
- Add capacitor.config.ts with plugin configuration
- Fix test file package names from com.getcapacitor.myapp to com.timesafari.dailynotification
- Move test files to correct package directories
- Test app now builds successfully and creates APK
- Capacitor sync now works (Android portion)
- Build script handles both plugin and test app builds

The android/app test app is now fully functional and can be used
to test the DailyNotification plugin in a real Android environment.

android/app/src/androidTest/java/com/timesafari/dailynotification/ExampleInstrumentedTest.java

@@ -1,4 +1,4 @@
-package com.getcapacitor.myapp;
+package com.timesafari.dailynotification;
 
 import static org.junit.Assert.*;
 
@@ -21,6 +21,6 @@ public class ExampleInstrumentedTest {
         // Context of the app under test.
         Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
 
-        assertEquals("com.getcapacitor.app", appContext.getPackageName());
+        assertEquals("com.timesafari.dailynotification", appContext.getPackageName());
     }
 }

android/app/src/test/java/com/timesafari/dailynotification/ExampleUnitTest.java

@@ -1,4 +1,4 @@
-package com.getcapacitor.myapp;
+package com.timesafari.dailynotification;
 
 import static org.junit.Assert.*;