Add workaround for testing Launcher3Tests

Correct test config path and adding LOCAL_COMPATIBILITY_SUPPORT_FILES.

Bug: 183540376
Test: atest Launcher3Tests
Change-Id: Ifd2a863cc1af838d78ed023a4405e3d2c450b62b
diff --git a/tests/Android.mk b/tests/Android.mk
index 883a69e..19b9656 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -76,6 +76,10 @@
 
 LOCAL_INSTRUMENTATION_FOR := Launcher3
 
+LOCAL_TEST_CONFIG := Launcher3Tests.xml
+
+LOCAL_COMPATIBILITY_SUPPORT_FILES := $(call intermediates-dir-for,APPS,Launcher3)/package.apk:Launcher3.apk
+
 LOCAL_LICENSE_KINDS := SPDX-license-identifier-Apache-2.0
 LOCAL_LICENSE_CONDITIONS := notice
 LOCAL_NOTICE_FILE := $(LOCAL_PATH)/../NOTICE