Revert "add aid check when writting into logd stats buffer. For now we require aid to be system."

This reverts commit ec0c886da6ff8a1f2855f496b40fd4459c74e7ea.

I will submit the new permission check through AOSP. Revert this CL to avoid merge conflict.

Change-Id: I5d29ad2cda3579b37dd7136037af0c85c3917f6b
diff --git a/logd/LogListener.cpp b/logd/LogListener.cpp
index 0bd4008..d2df68e 100644
--- a/logd/LogListener.cpp
+++ b/logd/LogListener.cpp
@@ -101,14 +101,6 @@
         return false;
     }
 
-    if (header->id == LOG_ID_STATS) {
-        // Only accept logging from *ManagerService in system server
-        // Will add more later as we see fit.
-        if (cred->uid != AID_SYSTEM && cred->gid != AID_SYSTEM) {
-            return false;
-        }
-    }
-
     // Check credential validity, acquire corrected details if not supplied.
     if (cred->pid == 0) {
         cred->pid = logbuf ? logbuf->tidToPid(header->tid)