remove unused flags

Change-Id: I2d19ce8ca149c30365f0a380cee4ebede7291813
audio: pcm offload

Change-Id: I337f9fd4774b0d9aefdda128b41683ea38117e9e
use Google/ffmpeg codecs

Change-Id: I2d777ed27ed1865bf1481eeddb69578eac90110f
add back BOARD_EGL_SYSTEMUI_PBSIZE_HACK

SystemUI crashes without this commit, we should fix it in other ways if possible

Change-Id: I36dca966db9e3b3fa53b2c1baff6d170b2932f44