Enable cmake testing

Bug: 302718225
Test: atest binder_sdk_test
Change-Id: Id841d73d11f3b0c75f7bcd523be8ff69300a503e
diff --git a/cc/cmake_main.txt b/cc/cmake_main.txt
index deb1de1..e9177d6 100644
--- a/cc/cmake_main.txt
+++ b/cc/cmake_main.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.18)
 project(<<.M.Name>> CXX)
 set(CMAKE_CXX_STANDARD 20)
+enable_testing()
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 include(AddAidlLibrary)