[LE Audio] Add check for >= 32kHz dual mic audio configuration

We need a flag to check if sampling freqency greater or equal to 32kHz
dual mic with bidirectional CIS is supported for specific devices.

Test: atest --host bluetooth_le_audio_test
Test: atest BluetoothInstrumentationTests
Test: manual
Bug: 289952814
Tag: #feature
Change-Id: Ib9a3208a671dc696f3face9d82aa4cdf76900a27