Fix crash on second invocation of camera when running on iOS 10 simulator (#441)

ios/RCTCameraManager.m

@@ -995,6 +995,7 @@ didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
 
 - (void)setCaptureQuality:(NSString *)quality
 {
+    #if !(TARGET_IPHONE_SIMULATOR)
         if (quality) {
             [self.session beginConfiguration];
             if ([self.session canSetSessionPreset:quality]) {
@@ -1002,6 +1003,7 @@ didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL
             }
             [self.session commitConfiguration];
         }
+    #endif
 }
 
 @end