change test with androidTypings

Author: Miroslava Ivanova

tests/build/android/build_android_tests.py

@@ -369,7 +369,7 @@ def test_441_android_typings(self):
         # Build with --androidTypings got nothing #3381
         Tns.run_tns_command("build android --androidTypings", attributes={"--path": self.app_name})
         assert File.exists(self.app_name + "/android.d.ts")
-        assert File.exists(self.app_name + "/_helpers.d.ts")
+        assert File.exists(self.app_name + "/android-declarations.d.ts")
 
     def test_442_include_gradle_flavor(self):
         # https://github.com/NativeScript/android-runtime/pull/937