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