Added power manager service library.

Added library with native binder interface to PowerManagerService.

Change-Id: Ic99efce5058b8c1a81ff277dfaa42f192441080c
diff --git a/target/product/core.mk b/target/product/core.mk
index 0f1455e..bd32757 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -101,7 +101,8 @@
     libspeexresampler \
     libwebrtc_audio_preprocessing \
     libaudiopreprocessing \
-    hostapd
+    hostapd \
+    libpowermanager
 
 # host-only dependencies
 ifeq ($(WITH_HOST_DALVIK),true)