[LE_Broadcast] Add more APIs for the broadcast profile

- Modify the Start API and Stop API
- Add the ProgramInfo, BroadcastCode, AppSourceName, BroadcastId
- Add the BluetoothLeBroadcast.Callback

Bug: 227511707
Test: build pass
Change-Id: I2a14bd16b39f11adbcaad63db128ab44ff9dc9da
1 file changed