Include watchdogd where init is included

watchdogd is now separated out from init, so include it where init is
included.

Bug: 73660730
Test: watchdogd is still included on builds
Change-Id: I8208b4bcfd4e2a948744c241b744daf0be3d1381
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 3311e3d..12cee24 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -241,6 +241,7 @@
     voip-common \
     vold \
     WallpaperBackup \
+    watchdogd \
     wificond \
     wifi-service \
     wm \