Schematize vold system properties

Properties accessed across partitions are now schematized and will
become APIs to make explicit interfaces among partitions.

Bug: 117924132
Test: m -j
Change-Id: I8e04f643197b6c8a60cc38c6979e41c5de3469f5
(cherry picked from commit 0cf5fc1433ef113d33d40b62cfca9ce97de12a4b)
diff --git a/Android.bp b/Android.bp
index 10b92f3..8c9a14c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -644,6 +644,8 @@
         "core/java/com/android/server/DropboxLogTags.logtags",
         "core/java/org/chromium/arc/EventLogTags.logtags",
 
+        ":platform-properties",
+
         ":framework-statslog-gen",
     ],