Revert extra buffer hack.

 * Breaks too many things, and this is an awful hack anyway.

Revert "stagefright: Fix "add an extra buffer to ANW's BUfferQueue""

This reverts commit dbb2bb90acd47a53d84809b1aa150bac6093f752.

Revert "stagefright: add an extra buffer to ANW's BUfferQueue"

This reverts commit 2bce3e06f60a8d60c81261b0438d0cc6f2bbe7d1.