audio-caf: added BOARD_HAVE_LOW_LATENCY_AUDIO

Allows disabling usage of Lowlatency use cases - default is
to use them

Change-Id: I7ad9a539886de32929aeef4b08d4a1d2323820fb
Merge "audio-caf: added BOARD_HAVE_LOW_LATENCY_AUDIO" into android-4.4