I was getting frequent crash-on-rotate NullPointerExceptions after scanning
QR Codes. This fixes it for me.
ConfirmReceiveSwapFragment is only ever used once in ConnectSwapActivity,
so it is a pointless abstraction. It makes the code a lot more complicated
and also creates very complicated situations to handle when the screen is
rotated. All of this gets much easier when everything is just included in
the Activity, since there is no problem being solved by the Fragments.
Fragments are for reusing chunks of UI in multiple places, or for showing
multiple chunks of UI in the same Activity. Both of those cases can also
be handled, arguably better, without using Fragments:
https://corner.squareup.com/2014/10/advocating-against-android-fragments.html
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