g2: Use QCOM PowerHAL

Preferable that we use the 2.5.18 QC-OPT (I'll open a pull request
at TheMuppets)

Change-Id: I1c1698d8ae0e34f7c2deffd8b8fdf66f0b915f22
Update toolchain

Change-Id: Ib74978f289a9bc1ea6eaca7dccaf51c6c1f7d80a
selinux: Add missing file

derp...

Change-Id: Ide539688125d4ea3f3a5241aee092f572b004542
media: Enable ffmpeg decoders

Change-Id: I30eb149a1be00eb312986f7c205a648e788ae0c0
audio: Remove resampler config item

This breaks the current floating-point mixer code

Change-Id: I54ade9b3a7967f3ddf50b618792c8f621a647d90