Do coverage tests on package.apk.unaligned

Instead of package.apk, which may be stripped off classes.dex.

Change-Id: Ia9121fe464e618444c3101ea97398af26c6d9730
diff --git a/CtsTestCoverage.mk b/CtsTestCoverage.mk
index 7053fea..588c8f5 100644
--- a/CtsTestCoverage.mk
+++ b/CtsTestCoverage.mk
@@ -60,6 +60,8 @@
 	$(hide) echo $(1): file://$(ANDROID_BUILD_TOP)/$(COVERAGE_OUT)/$(4)
 endef
 
+# classes.dex is stripped from package.apk if dex-preopt is enabled,
+# so we use the copy that definitely includes classes.dex.
 define add-testcase-apk
-	TEST_APKS += $(call intermediates-dir-for,APPS,$(1))/package.apk
+	TEST_APKS += $(call intermediates-dir-for,APPS,$(1))/package.apk.unaligned
 endef