Update tests for appContextWillSwitch and appContextDidReturn
Update tests for appContextWillSwitch and appContextDidReturn

billCTG/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,braintree/braintree_ios