Add log points to the encryption-public-key.ts file

### Description
We need to add four logging events to the encryption-public-key file.

1. Message proposed - [async newRequestEncryptionPublicKey(](https://github.com/MetaMask/metamask-extension/blob/2a227c46461c8b767f6b2cad89ce347a6483cb13/app/scripts/controllers/encryption-public-key.ts#L185-L186)
2. Message signed - [async encryptionPublicKey(msgParams: EncryptionPublicKeyParamsMetamask) {](https://github.com/MetaMask/metamask-extension/blob/2a227c46461c8b767f6b2cad89ce347a6483cb13/app/scripts/controllers/encryption-public-key.ts#L237-L238)
3. Message rejected - [cancelEncryptionPublicKey(msgId: string) {](https://github.com/MetaMask/metamask-extension/blob/2a227c46461c8b767f6b2cad89ce347a6483cb13/app/scripts/controllers/encryption-public-key.ts#L277)
4. Message rejected - [private _cancelAbstractMessage(](https://github.com/MetaMask/metamask-extension/blob/2a227c46461c8b767f6b2cad89ce347a6483cb13/app/scripts/controllers/encryption-public-key.ts#L308)

We need to record the data as well as the origin of the request. We should use the controllerMessenger the same way we did in the SignatureController as part of #19396, which will transfer well to the Core repo if this gets lifted there eventually.

Start in app/scripts/controllers/encryption-public-key.ts at newRequestEncryptionPublicKey, encryptionPublicKey, cancelEncryptionPublicKey, and _cancelAbstractMessage. Compare the controllerMessenger usage in SignatureController from #19396. Done means four logging events record the request data and its origin at the specified message lifecycle points.

Written by the indexing model from the issue text.