Disable BASS based on the HW capabilities

* Disable the broadcast assitant service if HW cannot support.
* Align the checking mechanism between
  isLeAudioBroadcastAssistantSupported() and isLeAudioSupported()

Bug: 224694309
Tag: #feature
Test: Broadcast assistant should be disbled if HW doesn't supported
Change-Id: I3bf6753fcb68d5cb176944e635f077bd9d28bbeb