Fix crash in RCTBlobManager in bridgeless mode

Summary:
When bridge is nil, RCTBlobManager crashes with `EXC_BAD_ACCESS`.

The fix: instead of using the bridge to find RCTNetworking, use TM lookup delegate.

Changelog: [iOS][Internal] Fix crash in RCTBlobManager in bridgeless mode

Reviewed By: mdvacca

Differential Revision: D19320136

fbshipit-source-id: 49aabb3ce53b2ec620fcc02be1c6c1b44066f440

Libraries/Blob/RCTBlobManager.mm

@@ -38,6 +38,7 @@ RCT_EXPORT_MODULE(BlobModule)
 
 @synthesize bridge = _bridge;
 @synthesize methodQueue = _methodQueue;
+@synthesize turboModuleLookupDelegate = _turboModuleLookupDelegate;
 
 - (void)setBridge:(RCTBridge *)bridge
 {
@@ -139,9 +140,11 @@ RCT_EXPORT_MODULE(BlobModule)
 
 RCT_EXPORT_METHOD(addNetworkingHandler)
 {
-  dispatch_async(_bridge.networking.methodQueue, ^{
-    [self->_bridge.networking addRequestHandler:self];
-    [self->_bridge.networking addResponseHandler:self];
+  RCTNetworking *const networking = _bridge ? _bridge.networking : [_turboModuleLookupDelegate moduleForName:"RCTNetworking"];
+
+  dispatch_async(networking.methodQueue, ^{
+    [networking addRequestHandler:self];
+    [networking addResponseHandler:self];
   });
 }