Crash in KeyringModel

[SergeyZhukovsky]

I found that crash in Google Play Console on nightly 1.67.73. It's fine to just fix it in master as we don't have a lot of them.

Exception java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
  at org.chromium.chrome.browser.app.domain.KeyringModel.isWalletCreated (KeyringModel.java:125)
  at org.chromium.chrome.browser.crypto_wallet.fragments.onboarding.OnboardingCreatingWalletFragment.onResume (OnboardingCreatingWalletFragment.java:57)
  at androidx.fragment.app.Fragment.performResume (Fragment.java:3206)
  at androidx.fragment.app.FragmentStateManager.resume (FragmentStateManager.java:658)
  at androidx.fragment.app.FragmentStateManager.moveToExpectedState (FragmentStateManager.java:302)
  at androidx.fragment.app.FragmentManager.executeOpsTogether (FragmentManager.java:2150)
  at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute (FragmentManager.java:2045)
  at androidx.fragment.app.FragmentManager.execSingleAction (FragmentManager.java:1957)
  at androidx.fragment.app.BackStackRecord.commitNow (BackStackRecord.java:317)
  at androidx.viewpager2.adapter.FragmentStateAdapter$FragmentMaxLifecycleEnforcer.updateFragmentMaxLifecycle (FragmentStateAdapter.java:747)
  at androidx.viewpager2.adapter.FragmentStateAdapter$FragmentMaxLifecycleEnforcer$1.onPageScrollStateChanged (FragmentStateAdapter.java:648)
  at androidx.viewpager2.widget.CompositeOnPageChangeCallback.onPageScrollStateChanged (CompositeOnPageChangeCallback.java:87)
  at androidx.viewpager2.widget.CompositeOnPageChangeCallback.onPageScrollStateChanged (CompositeOnPageChangeCallback.java:87)
  at androidx.viewpager2.widget.ScrollEventAdapter.dispatchStateChanged (ScrollEventAdapter.java:425)
  at androidx.viewpager2.widget.ScrollEventAdapter.onScrolled (ScrollEventAdapter.java:213)
  at androidx.recyclerview.widget.RecyclerView.dispatchOnScrolled (RecyclerView.java:5678)
  at androidx.recyclerview.widget.RecyclerView$ViewFlinger.run (RecyclerView.java:5861)
  at android.view.Choreographer$CallbackRecord.run (Choreographer.java:1301)
  at android.view.Choreographer$CallbackRecord.run (Choreographer.java:1309)
  at android.view.Choreographer.doCallbacks (Choreographer.java:923)
  at android.view.Choreographer.doFrame (Choreographer.java:847)
  at android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:1283)
  at android.os.Handler.handleCallback (Handler.java:942)
  at android.os.Handler.dispatchMessage (Handler.java:99)
  at android.os.Looper.loopOnce (Looper.java:226)
  at android.os.Looper.loop (Looper.java:313)
  at android.app.ActivityThread.main (ActivityThread.java:8762)
  at java.lang.reflect.Method.invoke
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:604)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1067)