Problem: Can not query walletconnect status (fix #257)

[damoncro]

Close:

• Problem: Can not query walletconnect status #257

Solutions:

• Add internal _session_info and remove const
• Add public function: GetWalletConnectSessionInfo

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[tomtau]

thread-safety is ok?

[damoncro]

thread-safety is ok?

It should be fine, without the AsynTask, OnReceiveWalletconnectSessionInfoDelegate could be called in GameThread correctly (AysncTask and run it in GameThread is redundant).

[tomtau]

maybe ok, but for the UE concurrency better for @leejw51crypto to check

[tomtau]

ok, the potential concurrency issues may be revisited in a follow up PR