Expose binder stability for debugging in dumpsys

See if a service is coupled with the system/core build variant or build
variant (or if the service has 'vintf' stability - meaning it is used as
a HAL). This will also print additional information about the version of
the binder wire protocol that is being used by this object (currently
everything uses the same version - this may be the case for a while).

Fixes: 184062810
Test: dumpsys_test
Test: manually running 'dumpsys --stability' and 'dumpsys --help'
Change-Id: Ia9f1d011ef28a9d62a3076fa497ebb33ed53fe0a
diff --git a/cmds/dumpsys/dumpsys.h b/cmds/dumpsys/dumpsys.h
index 349947c..1b3ae6a 100644
--- a/cmds/dumpsys/dumpsys.h
+++ b/cmds/dumpsys/dumpsys.h
@@ -52,9 +52,10 @@
     static void setServiceArgs(Vector<String16>& args, bool asProto, int priorityFlags);
 
     enum class Type {
-        DUMP,    // dump using `dump` function
-        PID,     // dump pid of server only
-        THREAD,  // dump thread usage of server only
+        DUMP,      // dump using `dump` function
+        PID,       // dump pid of server only
+        STABILITY, // dump stability information of server
+        THREAD,    // dump thread usage of server only
     };
 
     /**