Delay Bluetooth Start

If bluetooth is started too early, it will need to be restarted to
change its gid.
By delaying the bluetooth start after the OnUserStarting we ensure the
permissions are already set

Fix: 232740613
Test: build & flash with wipe. Check log at first startup
Tag: #refactor
Merged-In: Ifde1348baad5802276679ecc24bc8ae458d02fe6
Change-Id: Ifde1348baad5802276679ecc24bc8ae458d02fe6