Change the instrumentation app build target type

Change the instrumentation app build target type to avoid generating a TradeFed test module config file.

Test: make csuite && csuite-tradefed run <plan>
Change-Id: Iedfb415080fbd2c77537fd87f6a7f501c6a9fa97
diff --git a/tests/Compatibility/Android.bp b/tests/Compatibility/Android.bp
index 7dc44fa..c14e705 100644
--- a/tests/Compatibility/Android.bp
+++ b/tests/Compatibility/Android.bp
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-android_test {
+android_test_helper_app {
     name: "AppCompatibilityTest",
     static_libs: ["androidx.test.rules"],
     // Include all test java files.