[LE Audio] To remove the broadcast source item that created by receive

state

    - When the user clicks another broadcast source and wants to join,
      we will remove the previous item that created by getAllSource().
      And trigger the search again.

Bug: 242267719
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothBroadcastSourcePreferenceTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothFindBroadcastsFragmentTest
Change-Id: I416f0a39e31276876e63360664555f99dd7297c9
Merged-In: I416f0a39e31276876e63360664555f99dd7297c9

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

@@ -170,6 +170,16 @@ class BluetoothBroadcastSourcePreference extends Preference {
         return mIsEncrypted;
     }
 
+    /**
+     * Whether the broadcast source is connected at the beginging. We will get the
+     * BluetoothLeBroadcastReceiveState from the broadcast source.
+     * See {@link BluetoothFindBroadcastsFragment#addConnectedSourcePreference}
+     * @return If true, the broadcast source is already connected by the broadcast sink.
+     */
+    public boolean isCreatedByReceiveState() {
+        return mBluetoothLeBroadcastReceiveState != null;
+    }
+
     /**
      * Clear the BluetoothLeBroadcastReceiveState and reset the state when the user clicks the
      * "leave broadcast" button.