Add power.stats HAL 1.0 sepolicy

Also giving statsd permission to access it. This change copies the internal sepolicy to AOSP.

Bug: 111185513
Bug: 120551881
Test: make
Change-Id: I7e0386777e05580299caf9b97cb7804459f1a9d0
diff --git a/private/hwservice_contexts b/private/hwservice_contexts
index 9733994..f64eccd 100644
--- a/private/hwservice_contexts
+++ b/private/hwservice_contexts
@@ -43,6 +43,7 @@
 android.hardware.nfc::INfc                                      u:object_r:hal_nfc_hwservice:s0
 android.hardware.oemlock::IOemLock                              u:object_r:hal_oemlock_hwservice:s0
 android.hardware.power::IPower                                  u:object_r:hal_power_hwservice:s0
+android.hardware.power.stats::IPowerStats                       u:object_r:hal_power_stats_hwservice:s0
 android.hardware.radio.config::IRadioConfig                     u:object_r:hal_telephony_hwservice:s0
 android.hardware.radio.deprecated::IOemHook                     u:object_r:hal_telephony_hwservice:s0
 android.hardware.radio::IRadio                                  u:object_r:hal_telephony_hwservice:s0