Use wait instead of wait_for to wait until a new command arrives.

In AAudio command queue, when using maximum value for int64_t in wait_for
may cause overflow and the command queue will return immediately.

Bug: 438037027
Test: test offload playback
Flag: EXEMPT bugfix
Change-Id: I2aca5f7be824fcecb96ff622c8bc3d8ba03dcf89