Add min_sdk_version rule to allow use from AppSearch apex. am: 7ff0430d5c am: 9a3961aa8f

Original change: https://android-review.googlesource.com/c/platform/external/libutf/+/2002811

Change-Id: Ib1d4ea283629320b9f4bbacb297be22adb5e5233
diff --git a/Android.bp b/Android.bp
index 837c0fe..8b30794 100644
--- a/Android.bp
+++ b/Android.bp
@@ -67,7 +67,7 @@
         },
     },
     sdk_version: "14",
-
+    min_sdk_version: "14",
     apex_available: [
         "//apex_available:platform",
         "com.android.appsearch",