leaudio: Fix unit test

Make sure test is acurate to the name.
Handling post merge review comment of
3a9f0171 leaudio: Improve some unit tests

Bug: 230107540
Test: atest BluetoothInstrumentationTests
Tag: #feature
Merged-In: Ifc426777cb5f42f459491fbd4683404ebd8ea233
Change-Id: Ifc426777cb5f42f459491fbd4683404ebd8ea233
(cherry picked from commit db3c1564)