Add the way for hiding the "contact sharing" on the pairing dialog

There is the way to hide the "contact sharing" at the "device details"
page, but it did not be implemented on the pairing dialog. Add this way
on pairing dialog.

Bug: 246668278
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothPairingControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothPairingDialogTest

Change-Id: I472acb80e70fe5d2a59cb9eed95fcbccfa417fa5