Move StatsDimensionsValue.java to statsd apex

Test: builds, boots
Bug: 146578788
Change-Id: Iaeb9eaf8c412964ccf57debca1445063e9120ef9
diff --git a/apex/framework/Android.bp b/apex/framework/Android.bp
index 231c910..2d6297d 100644
--- a/apex/framework/Android.bp
+++ b/apex/framework/Android.bp
@@ -30,6 +30,7 @@
     ],
     permitted_packages: [
         "android.app",
+        "android.os",
         "android.util",
     ],
     libs: [