Add StringsRelativeToTop

Needed for some follow up changes.

Bug: 183650682
Test: m nothing
Change-Id: Ic14cb4f4592d887dd897989482d540e12065c0fe
diff --git a/android/testing.go b/android/testing.go
index 5813d74..bfea6c5 100644
--- a/android/testing.go
+++ b/android/testing.go
@@ -1051,3 +1051,9 @@
 func StringRelativeToTop(config Config, command string) string {
 	return normalizeStringRelativeToTop(config, command)
 }
+
+// StringsRelativeToTop will return a new slice such that each item in the new slice is the result
+// of calling StringRelativeToTop on the corresponding item in the input slice.
+func StringsRelativeToTop(config Config, command []string) []string {
+	return normalizeStringArrayRelativeToTop(config, command)
+}