Revert "stagefright: Improve 24-bit support"

This reverts commit b0e920ce5727f7c28f8c6c61e8b0ceb7ae21c716.
Revert "stagefright: Fix offload fallback for 24bit"

This reverts commit 892fc56df8010e0816b3cdc2f0c6bb619269acc1.
Revert "stagefright: Handle offload fallback for 24-bit tracks"

This reverts commit a1a9fb103219ec35a4b38246327436fe2ca8f3af.
Revert "stagefright: 24-bit audio support via offloading"

This reverts commit 53332b4e92d033e1c78529d45ed7f57702b17c88.