Crash after WP.com login

Reproducible on an emulator running Android 8.1.

**To reproduce:**
1. Install the app
2. Tap on Log in
3. Select Login with WordPress.com
4. Enter the credentials
5. After the browser redirection, approve the login on the web
6. Notice the crash

```
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.automattic.simplenote.debug/com.automattic.simplenote.SimplenoteAuthenticationActivity}: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.simperium.android.LoginBottomSheetDialogFragment: could not find Fragment constructor
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: androidx.fragment.app.Fragment$InstantiationException: Unable to instantiate fragment com.simperium.android.LoginBottomSheetDialogFragment: could not find Fragment constructor
at androidx.fragment.app.Fragment.instantiate(Fragment.java:538)
at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
at androidx.fragment.app.FragmentManagerImpl$6.instantiate(FragmentManagerImpl.java:2851)
at androidx.fragment.app.FragmentState.instantiate(FragmentState.java:85)
at androidx.fragment.app.FragmentManagerImpl.restoreSaveState(FragmentManagerImpl.java:2488)
at androidx.fragment.app.FragmentController.restoreSaveState(FragmentController.java:195)
at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:288)
at androidx.appcompat.app.AppCompatActivity.onCreate(AppCompatActivity.java:106)
at com.simperium.android.AuthenticationActivity.onCreate(AuthenticationActivity.java:20)
at android.app.Activity.performCreate(Activity.java:7009)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.lang.NoSuchMethodException: []
at java.lang.Class.getConstructor0(Class.java:2320)
at java.lang.Class.getConstructor(Class.java:1725)
at androidx.fragment.app.Fragment.instantiate(Fragment.java:523)
at androidx.fragment.app.FragmentContainer.instantiate(FragmentContainer.java:57)
at androidx.fragment.app.FragmentManagerImpl$6.instantiate(FragmentManagerImpl.java:2851)
at androidx.fragment.app.FragmentState.instantiate(FragmentState.java:85)
at androidx.fragment.app.FragmentManagerImpl.restoreSaveState(FragmentManagerImpl.java:2488)
at androidx.fragment.app.FragmentController.restoreSaveState(FragmentController.java:195)
at androidx.fragment.app.FragmentActivity.onCreate(FragmentActivity.java:288)
at androidx.appcompat.app.AppCompatActivity.onCreate(AppCompatActivity.java:106)
at com.simperium.android.AuthenticationActivity.onCreate(AuthenticationActivity.java:20)
at android.app.Activity.performCreate(Activity.java:7009)
at android.app.Activity.performCreate(Activity.java:7000)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
```

Reproduce the login flow on an Android 8.1 emulator and start with SimplenoteAuthenticationActivity, AuthenticationActivity, and LoginBottomSheetDialogFragment from the stack trace. Check why Fragment restoration cannot find a no-argument constructor, then verify that WordPress.com login completes without a crash after browser redirection.

Written by the indexing model from the issue text.