add Miracast overlay flag

Change-Id: I09e5068bbc2059fa3def9be8434cb082d74424cd
Merge "add Miracast overlay flag" into cm-11.0
Revert "Turn off BLE, GATT, and SMP of Bluetooth stack"

This reverts commit 67b7e3ac6f697f37b709a403dbe82d7ec6a83e55.

Enable BLE, GATT and SMP for Nexus 7 2012 grouper and tilapia

Change-Id: I640b3b76a341efc98d1ed69b1dc60425cdc0070b
(cherry picked from commit f2a4cff785ba1070a4be342f2a86b00cd2248445)
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_asus_grouper into cm-11.0_HAZE