Change the secure text interpolation on the OnboardingConfirmation screen

[sashei]

Currently, we are assuming that the localized version of 256-bit encryption in our string constants will always line up with the localized version of the Storyboard string. Rather than using any strings from the OnboardingConfirmation.storyboard, this ticket will see creating a new strings with base values of Sync between devices with secure %@ and 256-bit encryption, allowing us to safely a) interpolate the link text and b) know that the link text will have a range in the destination string to be "linked" to.