libaudiohal@aidl: Follow up for callbacks handling

After receiving an async callback, retrieve the state
unconditionally.

Bug: 331300943
Test: mp3 and ogg offloaded playback (bug repro steps)
(cherry picked from https://android-review.googlesource.com/q/commit:4282cca6af7e1644042362515b045d790c4a59a9)
Merged-In: Ice9cf31b4f15f9af7c4c17c211f955f635d53b82
Change-Id: Ice9cf31b4f15f9af7c4c17c211f955f635d53b82