chore: fix measure handshake latency measurement in canary #5510
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Description
Updates the metrics for measuring handshake latency. Since the relay connection is now deferred it made the handshake measurement incorrect since it was measuring SDK initialization time. This PR fixes the measurement by triggering a connection explicitly. This PR also adds a new measurement for the SDK initialization time because it appears to be non-zero.
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Type of change
How has this been tested?
Not tested