Notify KeyringController for backedup on restore; Hide backup banner when observer received backedup

android/java/org/chromium/chrome/browser/crypto_wallet/activities/BraveWalletActivity.java

@@ -539,4 +539,9 @@ public class BraveWalletActivity extends AsyncInitializationActivity
     public void locked() {
         setNavigationFragments(UNLOCK_WALLET_ACTION);
     }
+
+    @Override
+    public void backedUp() {
+        findViewById(R.id.wallet_backup_banner).setVisibility(View.GONE);
+    }
 }

android/java/org/chromium/chrome/browser/crypto_wallet/fragments/onboarding_fragments/RestoreWalletFragment.java

@@ -101,6 +101,7 @@ public class RestoreWalletFragment extends CryptoOnboardingFragment {
                             Utils.hideKeyboard(getActivity());
                             onNextPage.gotoNextPage(true);
                             Utils.setCryptoOnboarding(false);
+                            keyringController.notifyWalletBackupComplete();
                             Utils.clearClipboard(recoveryPhraseText.getText().toString().trim(), 0);
                             Utils.clearClipboard(passwordInput, 0);
                             Utils.clearClipboard(retypePasswordInput, 0);