Settings: [BT] Wrong Pairing Popup is shown on new pairing request.

Usecase:
1. Start advertising from DUT (using BLE Smartertooth app).
2. Scan and connect from central device.
3. Now initiate bond from central and accept pairing request.
   (Consent Pairing Dialog will be shown on DUT)
4. Notification will be received for PASSKEY CONFIRMATION Dialog.
   Do not open notification and let it timeout.
5. Repeat steps 2 and 3. At step 3, Passkey Confirmation pairing
   dialog is show instead of Consent pairing dialog.

Issue:
Wrong Pairing Popup is shown. Passkey Confirmation pairing
dialog is show instead of Consent pairing dialog.

Reproducible Rate: 100%

Root Cause:
PendingIntent created for showing pairing notification are getting
reused as only FLAG_ONE_SHOT is used. This flag is not updating new
extra's in the pending intent.

Fix:
Use flag FLAG_UPDATE_CURRENT in pending Intent.

Test: Tested above mentioned testcase and pairing scenarios.

Fix: 129479787
Bug: 129456113

Change-Id: I46813f355cd796cee1b472774b494c8580b39784

src/com/android/settings/bluetooth/BluetoothPairingService.java

@@ -124,7 +124,8 @@ public final class BluetoothPairingService extends Service {
                 .setLocalOnly(true);
 
         PendingIntent pairIntent = PendingIntent.getActivity(this, 0,
-                getPairingDialogIntent(this, intent), PendingIntent.FLAG_ONE_SHOT);
+                getPairingDialogIntent(this, intent),
+                PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_UPDATE_CURRENT);
 
         PendingIntent dismissIntent = PendingIntent.getBroadcast(this, 0,
                 new Intent(ACTION_DISMISS_PAIRING), PendingIntent.FLAG_ONE_SHOT);