AuthMethodPickerActivity is started multiple times

[Alex100]

• Start the firebase demo (version-0.6.0)
• Rotate the device during the Smartlock account chooser dialog (called by the ChooseAccountActivity in resolveSavedEmails(Activity activity))

• Press the back button multiple times until the AuthMethodPickerActivity is visible

• Then the AuthMethodPickerActivity is multiple times on the activity stack

The reason for that behaviour is that Smartlock account chooser dialog activity is started every time you rotate the device. This results in multiple calls of onActivityResult in ChooseAccountActivity, which starts every time the AuthMethodPickerActivity.

[SUPERCILEX]

This is fixed in #357.

[samtstern]

The fix for this issue has been released in version 1.0.1.