Move watchdogd out of init and into its own domain

Bug: 73660730
Test: watchdogd still runs
Change-Id: I31697c7c6fa2f7009731ff48c659af051838e42f
diff --git a/private/file_contexts b/private/file_contexts
index 9f3d817..e78c02f 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -296,6 +296,7 @@
 /system/bin/statsd               u:object_r:statsd_exec:s0
 /system/bin/bpfloader            u:object_r:bpfloader_exec:s0
 /system/bin/wait_for_keymaster   u:object_r:wait_for_keymaster_exec:s0
+/system/bin/watchdogd            u:object_r:watchdogd_exec:s0
 
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 # Vendor files