Enforce the types for sessionUserInfo. #356

Job	Run time
xcodebuild (ios, Debug)	5m 11s
xcodebuild (ios, Release)	4m 57s
xcodebuild (macos, Debug)	4m 23s
xcodebuild (macos, Release)	4m 25s
swift (debug)	4m 23s
xcodebuild (tvos, Debug)	5m 8s
swift (release)	4m 11s
xcodebuild (tvos, Release)	4m 29s
xcodebuild (visionos, Debug)	5m 18s
xcodebuild (visionos, Release)	5m 21s
xcodebuild (watchos, Debug)	1m 54s
xcodebuild (watchos, Release)	1m 36s
	51m 16s

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