msm8974: Update audio policy

 * Update sample rates, readd seperate low latency policy.

Change-Id: I1109c8664a42f8da51e5583e8e9d1ed1a2effe31
msm8974: Don't use the motion accelerometer

 * Use the normal sensor instead to resolve slow rotation issue

Change-Id: I2b2d95831246f2ee3a1989155675439613ea98ea