device-tests: As a dependency to tests

This change will build device-tests whenever tests is built.

Bug: 35386840
Test: None
Change-Id: If587bf74bb66b7ce5552493c73368bb68b6d34af
diff --git a/core/tasks/device-tests.mk b/core/tasks/device-tests.mk
index 731937f..cba83cb 100644
--- a/core/tasks/device-tests.mk
+++ b/core/tasks/device-tests.mk
@@ -25,3 +25,5 @@
 
 device-tests: $(device-tests-zip)
 $(call dist-for-goals, device-tests, $(device-tests-zip))
+
+tests: device-tests