Enforce the types for sessionUserInfo. #364

Job	Run time
swift (debug)	4m 5s
swift (release)	4m 7s
xcodebuild (ios, Debug)	5m 33s
xcodebuild (ios, Release)	6m 9s
xcodebuild (macos, Debug)	4m 36s
xcodebuild (macos, Release)	4m 36s
xcodebuild (tvos, Debug)	4m 46s
xcodebuild (tvos, Release)	5m 10s
xcodebuild (visionos, Debug)	6m 4s
xcodebuild (visionos, Release)	5m 57s
xcodebuild (watchos, Debug)	1m 38s
xcodebuild (watchos, Release)	3m 4s
	55m 45s

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