floss: Add IsDualModeAudioSinkDevice API

Add new API that returns true for a remote device if any device
in its CSIP group has LE Audio and HFP/A2DP profiles.

Bug: 341979141
Tag: #floss
Test: btclient - device info <Samsung Galaxy Pro Buds2>
Test: mmm packages/modules/Bluetooth
Flag: EXEMPT, floss change for ChromeOS only
Change-Id: I2e5cfd21d955f89ea75a21267bd8264b2042ecf4