Device Discoverability not set properly when Bluetooth is toggled

Issue:
When BT is turned off/on staying in the same BT Settings
screen discoverability was not set again.

Fix:
Handle setting discoverability Bluetooth state change
intents also when BT state is  turned ON.

Bug: 21944289
Change-Id: Ic3c8d476c53673b21d40ea2bd9669758d89c2aee

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

@@ -416,6 +416,10 @@ public final class BluetoothSettings extends DeviceListPreferenceFragment implem
     @Override
     public void onBluetoothStateChanged(int bluetoothState) {
         super.onBluetoothStateChanged(bluetoothState);
+        // If BT is turned off/on staying in the same BT Settings screen
+        // discoverability to be set again
+        if (BluetoothAdapter.STATE_ON == bluetoothState)
+            mInitiateDiscoverable = true;
         updateContent(bluetoothState);
     }