audio/msm7627a: Enable MSM AudioPolicyManager

- Update AudioPolicyManager class as per changes
in AudioPolicyManagerBase class.
- Enable the derived AudioPolicyManager.

Change-Id: I2426268c5a3a1b12b03cef2fa75ee661ecc78599
msm7x27a-common: fix External SD mounting (1/2)

still broken

Change-Id: I568d519c40505d0cf06742f8632575603702cc12
msm7x27a-common: update MediaCodec for 4.4

Change-Id: I64f8394365f2a1d67a1fdb2b1c77b12ea35fb415
msm7x27a-common:  Update supplicant services for new calling sequence

Change-Id: I30702f4f6fd1199f6a041f71ffa8cccbb8c53aa1
msm7x27a-common:libaudio: do not call property_get with too small buffer