ANDROID: GKI: ALSA: core: Add snd_soc_card_change_online_state() API

Add the snd_soc_card_change_online_state() API to
reduce ABI diff. Also adds a few missing members to
struct snd_card.

Test: build
Bug: 151372815
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Sudheer Papothi <spapothi@codeaurora.org>
Signed-off-by: Meng Wang <mwang@codeaurora.org>
Change-Id: Iee4991496138446d88bde5abc827bfd2a4a34074
(cherry picked from commit 473195feada1028a3d7cfc923120c13662a5b90c)
[hridya: amended commit to only include ABI diff,
changed EXPORT_SYMBOL -> EXPORT_SYMBOL_GPL]
Signed-off-by: Hridya Valsaraju <hridya@google.com>