make libserviceutility a shared lib

so that we have only one getpid_cached in mediaserver process

bug: 18919657

Change-Id: Iff3cd932c9110e874b3885f79705f49bf3e3f1fc
diff --git a/services/audiopolicy/Android.mk b/services/audiopolicy/Android.mk
index 6512c38..188fc89 100644
--- a/services/audiopolicy/Android.mk
+++ b/services/audiopolicy/Android.mk
@@ -30,7 +30,8 @@
     libbinder \
     libmedia \
     libhardware \
-    libhardware_legacy
+    libhardware_legacy \
+    libserviceutility
 
 ifneq ($(USE_LEGACY_AUDIO_POLICY), 1)
 LOCAL_SHARED_LIBRARIES += \
@@ -38,8 +39,7 @@
 endif
 
 LOCAL_STATIC_LIBRARIES := \
-    libmedia_helper \
-    libserviceutility
+    libmedia_helper
 
 LOCAL_MODULE:= libaudiopolicyservice