Set IRK always

Set IRK always

[Problem] Android 6.x devices which don't support privacy 1.2 couldn't
 make LE connection to the device which doesn't distribute IRK when pairing.
[Cause & Measure] Android 6.x devices which don't support privacy 1.2
 use wrong address type when it tries to connect if remote device doesn't
 distributes IRK. This is Android 6.x device's bug but for compatibility
 Tizen need to distribute IRK even though Privacy feature is disabled.
[Checking Method] Pair BLE with A3 / A5 phones of Android version 6.x ->
 Disconnect -> Try connect BLE again

Change-Id: I63d60721d6c2b7472110d09ceda51ca04e898029
Signed-off-by: Injun Yang <injun.yang@samsung.com>