framework-statsd: Add missing permitted package

A bug in Soong prevented the permitted package check from being
performed. Fixing the bug revealed that there was a missing package
on framework-statsd which this change adds.

Test: m framework-statsd
Bug: 157633658
Change-Id: Ic0602b9c4a65b57c1ee87ba2fcfaf82c2606e640

apex/statsd/framework/Android.bp

@@ -60,6 +60,8 @@ java_library {
         "android.app",
         "android.os",
         "android.util",
+        // From :statslog-statsd-java-gen
+        "com.android.internal.util",
     ],
 
     plugins: ["java_api_finder"],