Change factoryReset to succeed for Settings

Wrap a part of factoryReset with Binder.withCleanCallingIdentity() so
that it doesn't crash thinking that a different uid connected to the
network stack.

Test: build, manual
Change-Id: Iea246a4c1939a4e7e35434137051835ece81d92f

services/core/java/com/android/server/ConnectivityService.java

@@ -6892,8 +6892,10 @@ public class ConnectivityService extends IConnectivityManager.Stub
 
         final int userId = UserHandle.getCallingUserId();
 
-        final IpMemoryStore ipMemoryStore = IpMemoryStore.getMemoryStore(mContext);
-        ipMemoryStore.factoryReset();
+        Binder.withCleanCallingIdentity(() -> {
+            final IpMemoryStore ipMemoryStore = IpMemoryStore.getMemoryStore(mContext);
+            ipMemoryStore.factoryReset();
+        });
 
         // Turn airplane mode off
         setAirplaneMode(false);