Sepolicy: Allow stack dumps of statsd

Allow dumpstate & system server watchdog to dump statsd stacks.

Bug: 72461610
Test: m
Change-Id: I4c3472881da253f85d54b5e5b767b06e2618af9c

private/dumpstate.te

@@ -32,3 +32,8 @@ binder_call(dumpstate, statsd)
 
 # Collect metrics on boot time created by init
 get_prop(dumpstate, boottime_prop)
+
+# Signal native processes to dump their stack.
+allow dumpstate {
+  statsd
+}:process signal;

private/system_server.te

@@ -239,6 +239,7 @@ allow system_server {
   mediaserver
   mediametrics
   sdcardd
+  statsd
   surfaceflinger
 
   # This list comes from HAL_INTERFACES_OF_INTEREST in