Add androidx.car.app:app directory

Relnote: N/A

Bug: 144435201

Test: ./gradlew :car:app:app:checkApi && ./gradlew bOS
Change-Id: I3257326aaceaccd66628bbab8edc61006d996913
diff --git a/settings.gradle b/settings.gradle
index 83833f2..5a5a2c4 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -178,6 +178,7 @@
 includeProject(":camera:integration-tests:camera-testapp-uiwidgets", "camera/integration-tests/uiwidgetstestapp", [BuildType.MAIN])
 includeProject(":camera:integration-tests:camera-testapp-view", "camera/integration-tests/viewtestapp", [BuildType.MAIN])
 includeProject(":camera:integration-tests:camera-testlib-extensions", "camera/integration-tests/extensionstestlib", [BuildType.MAIN])
+includeProject(":car:app:app", "car/app/app", [BuildType.MAIN])
 includeProject(":cardview:cardview", "cardview/cardview", [BuildType.MAIN])
 includeProject(":collection:collection", "collection/collection", [BuildType.MAIN])
 includeProject(":collection:collection-benchmark", "collection/collection-benchmark", [BuildType.MAIN])