Revert "stagefright: 24-bit audio support via offloading"

This reverts commit 4b64612bf204df870095aecdda204b6d345e227d.

Change-Id: Icf3ca0d139dd304abdc34d4fdf10daf7a36a0249
Merge "Revert "stagefright: 24-bit audio support via offloading"" into du44