DO NOT MERGE - cherry pick a Bluetooth property fix from master
DO NOT MERGE - cherry pick a Bluetooth property fix from master

Check nullpointer of discoverableTimeout in initBluetoothAfterTurningOn.

When we fail to get the property, print out warning message, turn
Discoverable off.
Bug 6302990

Change-Id: Ie21aa2a89050c74d99d9ee521a95ffa822114757

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base