sound control: Import HTC Specific Sound Control

Modified for the One XL to support both standard faux123 sound control
(for MSM8960 devices) along with HTC specific sound control settings
(from faux123 as well) which allows for Beats headset integration, and a
few other new features. Allows for usage of both apps by faux123.

Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>