Fix Credo agent shutdown / restart on mobile

[cvarjao]

Currently in Credo there is a bug that occurs only in mobile where agent.shutdown() fails before isInitialized is set to false, which prevents us from directly using this Credo API for clean agent shutdown / restart in Bifold. Fixing this in Credo (and making a patch for Bifold / BC Wallet) may improve our websocket disconnect / reconnect process and will simplify the current shutdown / restart code in Bifold / BC Wallet some too.

Relevant issue: openwallet-foundation/credo-ts#2103

AC: nothing got worse and maybe websocket handling got better

[bryce-mcmath]

openwallet-foundation/credo-ts#2103

[jeznorth]

@bryce-mcmath please updated with AC as discussed.