Add READ_DEVICE_CONFIG permission for PANU usage

When running as PANU, Bluetooth process needs READ_DEVICE_CONFIG
permission, so is allowed to use of DeviceConfig API for PANU.

Bug: 148908889
Test: NAP and PANU manually
Change-Id: I7baf09a620726de4d7ce41d549063b6e98ca5541
1 file changed