Revert "root: msm8960 needs mtp,usbnet,adb"

This reverts commit b2aca983138f53a0083d47746214c8a9ea522ed3.
This was needed when old usb PIDs were used, to match Motorola usb
drivers for Windows. Now, when new PIDs are used, usbnet must go
away, so interface numbers (MI) match again.
This resolves adb driver installation issues reported by Windows
users.

Change-Id: I84f0424c62d4bf72a7cb2f514c1617b116dd6933
Fix audio policy regression

- remove A2DP and USB paths, they are handled by msm8960 audio HAL,
add A2DP and USB devices to primary route - to fix A2DP/USB playback
- restore LPA and tunnel paths
- disable fast path - to fix speakerphone volume

Change-Id: Ice9e64abab2d4d8230cc7e73518d0e0053e6618e
Eliminate speaker pop after lineout PA enable

- set delay to 32ms

Change-Id: I60ea12e3604c3081eebc39af3ff6306b3485de5b