leaudio: Improve CONFIGURED_AUTONOMOUS while reconfiguration

For the moment CONFIGURED_AUTONOMUSL and IDLE state are handles in the
same way. We can change it later if needed:

Bug: 222674521
Bug: 150670922
Test: atest --host bluetooth_le_audio_test bluetooth_le_audio_client_test

Change-Id: I8af5d39c0d26b7764d4f2678e805e4957e8c0b16