Fix catching authentication errors on Android 14 Pixel devices

[janicduplessis]

When encrypting values on Android 14 Pixel devices using AES_GCM it sometimes throw a different exception sometimes (I assume it is some bug in that sdk version). Here's the stack trace:

javax.crypto.IllegalBlockSizeException
java.io.IOException: javax.crypto.IllegalBlockSizeException
at javax.crypto.CipherOutputStream.close(CipherOutputStream.java:214)
at kotlin.io.CloseableKt.closeFinally(Closeable.kt:56)
at com.oblador.keychain.cipherStorage.CipherStorageBase.encryptString(CipherStorageBase.kt:373)
at com.oblador.keychain.cipherStorage.CipherStorageKeystoreAesGcm.encryptString(CipherStorageKeystoreAesGcm.kt:262)
at com.oblador.keychain.cipherStorage.CipherStorageKeystoreAesGcm.encrypt(CipherStorageKeystoreAesGcm.kt:97)
at com.oblador.keychain.KeychainModule.encryptToResult(KeychainModule.kt:587)
at com.oblador.keychain.KeychainModule.access$encryptToResult(KeychainModule.kt:38)
at com.oblador.keychain.KeychainModule$setGenericPassword$1.invokeSuspend(KeychainModule.kt:228)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:101)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:589)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:832)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:720)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:707)
Caused by: javax.crypto.IllegalBlockSizeException
at android.security.keystore2.AndroidKeyStoreCipherSpiBase.engineDoFinal(AndroidKeyStoreCipherSpiBase.java:605)
at javax.crypto.Cipher.doFinal(Cipher.java:1957)
at javax.crypto.CipherOutputStream.close(CipherOutputStream.java:210)
at kotlin.io.CloseableKt.closeFinally(Closeable.kt:56) 
at com.oblador.keychain.cipherStorage.CipherStorageBase.encryptString(CipherStorageBase.kt:373) 
at com.oblador.keychain.cipherStorage.CipherStorageKeystoreAesGcm.encryptString(CipherStorageKeystoreAesGcm.kt:262) 
at com.oblador.keychain.cipherStorage.CipherStorageKeystoreAesGcm.encrypt(CipherStorageKeystoreAesGcm.kt:97) 
at com.oblador.keychain.KeychainModule.encryptToResult(KeychainModule.kt:587) 
at com.oblador.keychain.KeychainModule.access$encryptToResult(KeychainModule.kt:38) 
at com.oblador.keychain.KeychainModule$setGenericPassword$1.invokeSuspend(KeychainModule.kt:228) 
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) 
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:101) 
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:589) 
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:832) 
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:720) 
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:707) 
Caused by: android.security.KeyStoreException: Key user not authenticated (internal Keystore code: -26 message: system/security/keystore2/src/operation.rs:836: KeystoreOperation::update

Caused by:
0: system/security/keystore2/src/operation.rs:390: Update failed.
1: Error::Km(r#KEY_USER_NOT_AUTHENTICATED)) (public error code: 2 internal Keystore code: -26)
at android.security.KeyStore2.getKeyStoreException(KeyStore2.java:386)
at android.security.KeyStoreOperation.handleExceptions(KeyStoreOperation.java:78)
at android.security.KeyStoreOperation.update(KeyStoreOperation.java:115)
at android.security.keystore2.KeyStoreCryptoOperationChunkedStreamer$MainDataStream.update(KeyStoreCryptoOperationChunkedStreamer.java:222)
at android.security.keystore2.KeyStoreCryptoOperationChunkedStreamer.update(KeyStoreCryptoOperationChunkedStreamer.java:156)
at android.security.keystore2.AndroidKeyStoreCipherSpiBase.engineUpdate(AndroidKeyStoreCipherSpiBase.java:430)
at javax.crypto.Cipher.update(Cipher.java:1741)
at javax.crypto.CipherOutputStream.write(CipherOutputStream.java:158)
at javax.crypto.CipherOutputStream.write(CipherOutputStream.java:144)
... 12 more

To detect it I added a recursive check on cause to find the KeyStoreException containing Key user not authenticated.

Tested that this works on Pixel 5 using Android 14.