MediaPlayer2: build static libs for some components

Test: compiles
Bug: 63934228
Change-Id: I1791b40a67c87ea3146825767699e5022444e433
diff --git a/media/libmediametrics/Android.bp b/media/libmediametrics/Android.bp
index 15dac59..07e124b 100644
--- a/media/libmediametrics/Android.bp
+++ b/media/libmediametrics/Android.bp
@@ -1,4 +1,6 @@
-cc_library_shared {
+// TODO: change it back to cc_library_shared when there is a way to
+// expose media metrics as stable API.
+cc_library {
     name: "libmediametrics",
 
     srcs: [