Check caller status precisely when registering receiver.

Fine tune commit 9ac9609f.
Because process may reuse same process record to restart.
It is better to check below conditions to skip:
1. Simple dead and has been cleaned.
 => .thread will be null
2.The process has restarted with new pid but has not attached yet.
 => .thread will be null
3.The process has restarted and attached.
 => The IBinder will be different

Change-Id: Ic052f5025558ca93e1a6ab11bca61fe995126bb9

services/core/java/com/android/server/am/ActivityManagerService.java

@@ -15262,8 +15262,9 @@ public final class ActivityManagerService extends ActivityManagerNative
         }
 
         synchronized (this) {
-            if (callerApp != null && callerApp.pid == 0) {
-                // Caller already died
+            if (callerApp != null && (callerApp.thread == null
+                    || callerApp.thread.asBinder() != caller.asBinder())) {
+                // Original caller already died
                 return null;
             }
             ReceiverList rl