Revert "Revert "Check for the DEVICE_POWER permission in userActivity.""

This reverts commit 4da4827504df019d4e64dd864f70526ff6d384a0.
diff --git a/services/java/com/android/server/PowerManagerService.java b/services/java/com/android/server/PowerManagerService.java
index 5d32b74..71105f1 100644
--- a/services/java/com/android/server/PowerManagerService.java
+++ b/services/java/com/android/server/PowerManagerService.java
@@ -2105,6 +2105,7 @@
     }
 
     public void userActivity(long time, boolean noChangeLights) {
+        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
         userActivity(time, -1, noChangeLights, OTHER_EVENT, false);
     }
 
@@ -2128,7 +2129,6 @@
 
     private void userActivity(long time, long timeoutOverride, boolean noChangeLights,
             int eventType, boolean force) {
-        //mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);
 
         if (((mPokey & POKE_LOCK_IGNORE_CHEEK_EVENTS) != 0)
                 && (eventType == CHEEK_EVENT || eventType == TOUCH_EVENT)) {