Add Gradle wrapper and configuration files for Android project

- Created gradle-wrapper.properties to specify Gradle distribution details.
- Added gradlew and gradlew.bat scripts for executing Gradle tasks.
- Introduced settings.gradle for project configuration and dependency management.
- Added assetlinks.json for Android App Links support.

tx-android/settings.gradle

@@ -0,0 +1,18 @@
+pluginManagement {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = 'TurnosXpressTwa'
+include ':app'