Fixes to CryptKeeper layout for phones

- prevents crash when trying to show error state
- makes progress screen not look horribly broken

Bug: 5174783
Bug: 4671153
Change-Id: Ia72830e2fdb72f174b3ed01b6fc14be7152d1932

src/com/android/settings/CryptKeeper.java

@@ -327,7 +327,9 @@ public class CryptKeeper extends Activity implements TextView.OnEditorActionList
         tv.setText(R.string.crypt_keeper_failed_summary);
 
         View view = findViewById(R.id.bottom_divider);
-        view.setVisibility(View.VISIBLE);
+        if (view != null) {
+            view.setVisibility(View.VISIBLE);
+        }
     }
 
     private void updateProgress() {