ANDROID: GKI: ALSA: core: modify, rename and export create_subdir API

Modify create_subdir API, so that it can create a subdir
under a given parent directory and then register the info
entry. Also rename and export the API so that it can be
used to expose ID and version related information.

Test: build
Bug: 151372815
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>
Signed-off-by: Meng Wang <mwang@codeaurora.org>
(cherry picked from commit 454c5b5c)
Signed-off-by: Hridya Valsaraju <hridya@google.com>
Change-Id: I8876b7ab22594766c9ec08c7289d8f38de7f00fa