android/hal-audio: Fix audio with large omtu value

android/hal-audio: Fix audio with large omtu value

This patch fixes media packet construction with devices which use large
omtu value. In such cases it's possible that we will try to fit more
than 15 SBC frames in single media packet (which is maximum possible
value as it's encoded using 4 bits) which will cause frame counter to
wrap around and provide incorrect data to SBC encoder.

This behaviour was seen on UPF with one of carkit devices which set
omtu=2688.