intermittent failures to register plugin on Android emulator about flutter_secure_storage

[mogol]

Please check
#13 (comment)

[stevesea]

upgraded to 3.1.2, seems to be behaving better; I still see that stack trace occasionally, but the app is still functional -- so it must be recovering from the problem

in case it's interesting, here's the current stack trace :

16:48:40.702 10 info flutter.tools Built build/app/outputs/apk/debug/app-debug.apk.
16:48:41.365 11 info flutter.tools E/FlutterSecureStoragePl( 8682): Registration failed
16:48:41.365 12 info flutter.tools E/FlutterSecureStoragePl( 8682): java.security.UnrecoverableKeyException: Failed to obtain information about private key
16:48:41.365 13 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:223)
16:48:41.365 14 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStoreKeyPairFromKeystore(AndroidKeyStoreProvider.java:259)
16:48:41.365 15 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePrivateKeyFromKeystore(AndroidKeyStoreProvider.java:269)
16:48:41.365 16 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.security.keystore.AndroidKeyStoreSpi.engineGetKey(AndroidKeyStoreSpi.java:94)
16:48:41.365 17 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at java.security.KeyStoreSpi.engineGetEntry(KeyStoreSpi.java:482)
16:48:41.365 18 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at java.security.KeyStore.getEntry(KeyStore.java:1560)
16:48:41.365 19 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.createRSAKeysIfNeeded(RSACipher18Implementation.java:93)
16:48:41.365 20 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.it_nomads.fluttersecurestorage.ciphers.RSACipher18Implementation.<init>(RSACipher18Implementation.java:30)
16:48:41.365 21 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.it_nomads.fluttersecurestorage.ciphers.StorageCipher18Implementation.<init>(StorageCipher18Implementation.java:31)
16:48:41.365 22 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.<init>(FlutterSecureStoragePlugin.java:46)
16:48:41.365 23 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin.registerWith(FlutterSecureStoragePlugin.java:33)
16:48:41.365 24 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:28)
16:48:41.365 25 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at [classpathredacted].MainActivity.onCreate(MainActivity.java:11)
16:48:41.365 26 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.Activity.performCreate(Activity.java:7009)
16:48:41.365 27 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.Activity.performCreate(Activity.java:7000)
16:48:41.365 28 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
16:48:41.365 29 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
16:48:41.365 30 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
16:48:41.365 31 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.ActivityThread.-wrap11(Unknown Source:0)
16:48:41.365 32 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
16:48:41.365 33 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.os.Handler.dispatchMessage(Handler.java:106)
16:48:41.365 34 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.os.Looper.loop(Looper.java:164)
16:48:41.365 35 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.app.ActivityThread.main(ActivityThread.java:6494)
16:48:41.365 36 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at java.lang.reflect.Method.invoke(Native Method)
16:48:41.365 37 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
16:48:41.365 38 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
16:48:41.365 39 info flutter.tools E/FlutterSecureStoragePl( 8682): Caused by: android.security.KeyStoreException: Invalid key blob
16:48:41.365 40 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.security.KeyStore.getKeyStoreException(KeyStore.java:697)
16:48:41.365 41 info flutter.tools E/FlutterSecureStoragePl( 8682): 	at android.security.keystore.AndroidKeyStoreProvider.loadAndroidKeyStorePublicKeyFromKeystore(AndroidKeyStoreProvider.java:224)
16:48:41.365 42 info flutter.tools E/FlutterSecureStoragePl( 8682): 	... 25 more
16:48:42.253 43 info flutter.tools Syncing files to device Android SDK built for x86...

[mogol]

@stevesea thanks for confirmation!
Sorry for inconvenience caused