[Audiosharing] Fix call audio device in call

During call, BT stack will keep the broadcast in a hysteresis mode,
however BT stack will remove the fallback group id, which leads the Call
audio summary empty. Here we check if there is active device on LE_AUDIO
profile when the fallback group id is removed. The active device on
LE_AUDIO profile should be the call audio device.

Test: atest
Bug: 355222285
Flag: com.android.settingslib.flags.enable_le_audio_sharing
Change-Id: I906f30631027439ed4060af758ef63eda1a0b12d