metricsd: Read build time values from etc/os-release.d.

This stops relying on system properties to provide build time
configuration.
Product version and id will be stored in /etc/os-release.d.
Channel will be pulled from update engine.

BUG: 24947119
Change-Id: I0972d03cd83ef622846de3cce3dec1992fcc46cd
diff --git a/metricsd/Android.mk b/metricsd/Android.mk
index 3deb7d3..8dbaad9 100644
--- a/metricsd/Android.mk
+++ b/metricsd/Android.mk
@@ -69,11 +69,11 @@
   libchrome-dbus \
   libchromeos-http \
   libchromeos-dbus \
-  libcutils \
   libdbus \
   libmetrics \
   libprotobuf-cpp-lite \
   librootdev \
+  libupdate_engine_client \
   libweaved \
 
 # Shared library for metrics.