Plumb CopaUseRttStanding from MobileConfig to TransportSettings
Plumb CopaUseRttStanding from MobileConfig to TransportSettings

Summary: Allows us to AB test Copa with and without RTT standing

Reviewed By: lnicco

Differential Revision: D24491619

fbshipit-source-id: 9d6acae46230a214fe79aeadd48e2fa7fd3a64cc

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