uapi: sound: add bt external sink delay parameter

Add support for reporting external sink delay
for split a2dp usecase.
Add RUN_STARTIME_RUN_AT_ABSOLUTEIME run mode to
support audio sync between bt and speaker in
relay and grandpa mode.

Change-Id: Ie7ff48f2e47fde93c4ed9e24fab024918772be82
Signed-off-by: Nirav Khatri <quic_khatri@quicinc.com>