fix(predictions): update liveness websocket send event to be synchron… #136

Job	Run time
Build Amplify Swift for iOS / Build Amplify-Build \| iOS	7m 12s
Build Amplify Swift for macOS / Build Amplify-Build \| macOS	9m 31s
Build Amplify Swift for tvOS / Build Amplify-Build \| tvOS	11m 22s
Build Amplify Swift for watchOS / Build Amplify-Build \| watchOS	8m 1s
Confirm Passing Build Steps	1s
	36m 7s

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