make setRequestingSid(false) work

Before, sid could never be turned from being requested to being
unrequested, but no one called the API.

Test: boot, check SafetyNet logs
Change-Id: I4adeeb172af80fc2708d7811dd4bbf26b2c2d960
diff --git a/Binder.cpp b/Binder.cpp
index 72884f0..87bc143 100644
--- a/Binder.cpp
+++ b/Binder.cpp
@@ -102,7 +102,7 @@
         if (!e) return; // out of memory
     }
 
-    e->mRequestingSid = true;
+    e->mRequestingSid = requestingSid;
 }
 
 status_t BHwBinder::transact(