Update confirm device credentials to spec, add fingerprint

- New strings in the screen.
- New layout/style.
- Clean up internal API's around it.
- Add fingerprint support if launched from externally
- Separate theme if launched from externally
- If launched from above Keyguard, use SHOW_WHEN_LOCKED flag

Change-Id: Icdf9bf9e0506841f24e8aab5f0f1d1f4b688951f

src/com/android/settings/CryptKeeperSettings.java

@@ -166,9 +166,8 @@ public class CryptKeeperSettings extends InstrumentedFragment {
             return true;
         }
 
-        return helper.launchConfirmationActivity(request, null,
-                res.getText(R.string.crypt_keeper_confirm_encrypt),
-                true);
+        return helper.launchConfirmationActivity(request,
+                res.getText(R.string.crypt_keeper_encrypt_title), true);
     }
 
     @Override