Bluetooth audio HAL: several fixes on buffer duration calculation

- Limit minimum buffer duration for spatializer output.
- Fix wrong use of output default buffer duration for input stream.
- Fix delay in case of write error to use actual buffer duration instead
of default.

Bug: 210803914
Test: spatial audio over Bluetooth A2DP
Change-Id: If56711ddf2e3f92dea2610fbf3b5a2b984a28aa5
Ignore-AOSP-First: Spatial audio demo