Add missing t.Helper() to androidmk functions

Test: go test soong tests
Change-Id: I534aef51afa91a0942f58b3987e9c1cb3f3c75cb
diff --git a/android/testing.go b/android/testing.go
index f9f9670..2256c96 100644
--- a/android/testing.go
+++ b/android/testing.go
@@ -1120,6 +1120,7 @@
 }
 
 func AndroidMkEntriesForTest(t *testing.T, ctx *TestContext, mod blueprint.Module) []AndroidMkEntries {
+	t.Helper()
 	var p AndroidMkEntriesProvider
 	var ok bool
 	if p, ok = mod.(AndroidMkEntriesProvider); !ok {
@@ -1134,6 +1135,7 @@
 }
 
 func AndroidMkDataForTest(t *testing.T, ctx *TestContext, mod blueprint.Module) AndroidMkData {
+	t.Helper()
 	var p AndroidMkDataProvider
 	var ok bool
 	if p, ok = mod.(AndroidMkDataProvider); !ok {