Add Wifi Display Support to Galaxy Nexus (6/7)

Author : Kensuke (Original)
Original thread : https://github.com/kensuke/How-to-Miracast-on-AOSP

Maguro bug fix : Carlos Manuel (Dreams Dev.)

Consist of 7 patches (2 additional packages)

1. build : add WFD and Mira4U to build list
2. wpa_supplicant : enable p2p connection
3. device repo: enable wifidisplay options by default
   add audio.r_submix.default to build: update media_codex, media_profiles and audio_policy.conf to enable proper encoding.
4. frameworks/av : add back driver from aosp 4.3, skip error check with failures.
5. frameworks/base : accept sink connection and custom wfd timeout control
6. frameworks/native : support sink rotation
7. packages/apps/Mira4U : Update version to support KitKat