For usb bluetooth, first insmod btusb.ko

we need CAP_NET_RAW to create raw inet socket, so add ourself to net_raw group.

export NET_RAW permission

add

<permission android:name="android.permission.NET_RAW"
    android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
    android:protectionLevel="signature" />

to frameworks/base/core/res/AndroidManifest.xml

map android's NET_RAW permission to linux's net_raw group

add

<permission name="android.permission.NET_RAW" >
    <group gid="net_raw" />
</permission>

to frameworks/base/data/etc/platform.xml

use NET_RAW permission in bluetooth apk

add

<uses-permission android:name="android.permission.NET_RAW" />

to packages/apps/Bluetooth/AndroidManifest.xml