fix crash when building/running from xcode 11.2.1 (bluetooth privileges)
fix crash when building/running from xcode 11.2.1 (bluetooth privileges)

- exception message says user description string for is required for info.plist NSBluetoothAlwaysUsageDescription key.
- have tested that we only get one pop-up on clean install
- leaving previous NSBluetoothPeripheralUsageDescription key in case this still needed on older toolchains

buddy: Vittorio

wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app,wrld3d/wrld-example-app