Add handling of base.reboot to weaved

Now that weaved can use binder on Brillo, add a command handler for
base.reboot command and delegate rebooting to native power manager
daemon.

BUG: 23759426
Change-Id: I88f18d953ae3072b154d6cc822d5064207316189
diff --git a/Android.mk b/Android.mk
index 10d7ba3..d1b171d 100644
--- a/Android.mk
+++ b/Android.mk
@@ -48,6 +48,7 @@
 	libchrome-dbus \
 	libcutils \
 	libdbus \
+	libnativepower \
 	libshill-client \
 	libutils \
 	libweave \