Add PowerManager method to assign blame to a single uid

Currently used by audioflinger to account for recording wakelocks.
b/10985160

Change-Id: I18fc8487f2a197bf02b5269a4bcae9e75b6c2207
diff --git a/data/etc/platform.xml b/data/etc/platform.xml
index 89d102d..3857ec0 100644
--- a/data/etc/platform.xml
+++ b/data/etc/platform.xml
@@ -128,6 +128,7 @@
     <assign-permission name="android.permission.MODIFY_AUDIO_SETTINGS" uid="media" />
     <assign-permission name="android.permission.ACCESS_SURFACE_FLINGER" uid="media" />
     <assign-permission name="android.permission.WAKE_LOCK" uid="media" />
+    <assign-permission name="android.permission.UPDATE_DEVICE_STATS" uid="media" />
     <assign-permission name="android.permission.UPDATE_APP_OPS_STATS" uid="media" />
 
     <assign-permission name="android.permission.ACCESS_SURFACE_FLINGER" uid="graphics" />