Revert "libstagefright: Convert mono to stereo for LPA clips"

Change-Id: Ib6cc3401c889a8ec52dc83e3bea367f94a582a40
Fix mako build.

Change-Id: Ic73cb2f4152ac77a83fcda7e89b4a8202df440c6
stagefright: Fix tunnel mode ifdefs

 * Was breaking on 8660 due to previous commit.

Change-Id: Ia9f5c45552cc933db336a66b6d1214b65e810488