Move watchdogd out of init

We're moving past a world where static executables are needed,
including watchdogd, so treat this like any other executable and place
it in /system/bin.

Bug: 73660730
Test: watchdogd still runs
Change-Id: I1f7508fd55dce6e9ee72a6ab7a085011a76c0053
diff --git a/init/init.h b/init/init.h
index 6c82fa1..f244ad7 100644
--- a/init/init.h
+++ b/init/init.h
@@ -31,8 +31,8 @@
 namespace android {
 namespace init {
 
-// Note: These globals are *only* valid in init, so they should not be used in ueventd,
-// watchdogd, or any files that may be included in those, such as devices.cpp and util.cpp.
+// Note: These globals are *only* valid in init, so they should not be used in ueventd
+// or any files that may be included in ueventd, such as devices.cpp and util.cpp.
 // TODO: Have an Init class and remove all globals.
 extern std::string default_console;
 extern std::vector<std::string> late_import_paths;