Make fmtlib_headers available to CTS. am: d0da765300

Original change: https://android-review.googlesource.com/c/platform/external/fmtlib/+/2725756

Change-Id: I3e610ef1e98bd9024eaa9e72ac767f7e859e564a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/Android.bp b/Android.bp
index cde6822..5044da4 100644
--- a/Android.bp
+++ b/Android.bp
@@ -76,6 +76,7 @@
     },
     visibility: ["//system/libbase"],
     min_sdk_version: "29",
+    sdk_version: "current",
     apex_available: [
         "//apex_available:anyapex",
         "//apex_available:platform",