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/ConfirmDeviceCredentialActivity.java

@@ -48,7 +48,8 @@ public class ConfirmDeviceCredentialActivity extends Activity {
         String details = intent.getStringExtra(KeyguardManager.EXTRA_DESCRIPTION);
 
         ChooseLockSettingsHelper helper = new ChooseLockSettingsHelper(this);
-        if (!helper.launchConfirmationActivity(0 /* request code */, title, details)) {
+        if (!helper.launchConfirmationActivity(0 /* request code */, null /* title */, title,
+                details, false /* returnCredentials */, true /* isExternal */)) {
             Log.d(TAG, "No pattern, password or PIN set.");
             setResult(Activity.RESULT_OK);
             finish();