To fix the footer link is not clickable in the Bluetooth Settings

 - Links are not allowed in footer preference title now. So follow the
   Wi-Fi UX design to add the string "Change". Let the user to click and
   go to the Bluetooth scanninng settings

Bug: 265167737
Test: make RunSettingsRoboTests
ROBOTEST_FILTER=BluetoothSwitchPreferenceControllerTest

Change-Id: If9e666df7b987e0dbe3d550ac0af03b9d79230de
Merged-In: If9e666df7b987e0dbe3d550ac0af03b9d79230de