Release 5.17.0

• Deprecates Button#stop() since it can lead to unexpected behavior when called externally. Apps should use Button#logout() instead.
• Deprecates ButtonDropin#prepareForDisplay(ButtonContext) and ButtonDropin#prepareForDisplay(ButtonContext, ButtonDropin.Listener). Apps should use ButtonDropin#prepareWithAction(AppAction) instead.
• Minor bug fixes and improvements to app install flow.