BassClientStateMachineTest: Fix wrongly set attributes

According to BASS specification Broadcast Audio Scan Control Point
must have set properties to: write, write without response. Broadcast
receiver state characteristic must have set properties to: read, notify.
Both characteristic requires encryption permission.

Bug: 300217671
Test: atest BassClientStateMachineTest
Tag: #feature
Change-Id: I61d376450f9482ae96e3e11bdc7d7f24798a381a