Replace no_framework_libs: true with sdk_version: "core_platform"

Bug: 134566750
Test: m
Change-Id: I30af321e35daf5d3a2ee47a3adfea880c676ec3c
diff --git a/proto/Android.bp b/proto/Android.bp
index a36f7a5..166be3d 100644
--- a/proto/Android.bp
+++ b/proto/Android.bp
@@ -22,7 +22,7 @@
         ],
     },
     srcs: ["src/**/*.proto"],
-    no_framework_libs: true,
+    sdk_version: "core_platform",
     jarjar_rules: "jarjar-rules.txt",
     // Pin java_version until jarjar is certified to support later versions. http://b/72703434
     java_version: "1.8",