cosmetic: auto-scan test_ functions

bug: NA
test: manually ran build/soong/run_integration_tests.sh and verified all tests ran
Change-Id: I1a0a2e227888efc2e7fd7f718b8e534e6dbdbcf1
diff --git a/tests/soong_test.sh b/tests/soong_test.sh
index 905d708..f7bee40 100755
--- a/tests/soong_test.sh
+++ b/tests/soong_test.sh
@@ -19,4 +19,4 @@
   run_soong clean
 }
 
-test_m_clean_works
+scan_and_run_tests
\ No newline at end of file