Clear the caller identity after the permission is verified

For the method requestNetworkScan(...), the caller identity was cleared
after verifying the permission in aosp/722888, but in a later cl
aosp/836166, this logic was removed which is causing issues.

Bug: 128480460
Test: manual test
Change-Id: I3af80b6b3ae3df31ed0f844535793b5fbe4bbc7e
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index f118133..d06d929 100755
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -4448,9 +4448,14 @@
                 }
             }
         }
-        return mNetworkScanRequestTracker.startNetworkScan(
-                request, messenger, binder, getPhone(subId),
-                callingPackage);
+        final long identity = Binder.clearCallingIdentity();
+        try {
+            return mNetworkScanRequestTracker.startNetworkScan(
+                    request, messenger, binder, getPhone(subId),
+                    callingPackage);
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
     }
 
     private SecurityException checkNetworkRequestForSanitizedLocationAccess(