Allow signals to hal_power_stats_server from dumpstate

This is needed for bugreport to include ANR trace for the process.

Bug: 128878895
Test: adb bugreport
Change-Id: I92e6952b03ffb047e9fb75b0e44024f2623debb3
diff --git a/public/dumpstate.te b/public/dumpstate.te
index 2d5e240..3995527 100644
--- a/public/dumpstate.te
+++ b/public/dumpstate.te
@@ -81,6 +81,7 @@
   hal_graphics_composer_server
   hal_health_server
   hal_omx_server
+  hal_power_stats_server
   hal_sensors_server
   hal_vr_server
 }:process signal;