Settings.System.AIRPLANE_MODE_TOGGLEABLE_RADIOS is a list of
radios that can be toggled while in airplane mode. This CL
changes BluetoothEnabler to respect this.
It parallels the logic in WifiEnabler, which enables OEMs
to allow Wifi changes when in airplane mode.
Most existing devices don't include "bluetooth" in the
toggleable list, which means bluetooth will continue to be
disabled when in airplane mode for those devices.
Fixes http://b/2297314
If the new system settings value for AIRPLANE_MODE_TOGGLEABLE_RADIOS
contains RADIO_WIFI, then the user will be allowed to enable Wifi
while in airplane mode.
Turning on airplane mode will still disable Wifi, but the user will
be free to reenable it in the Settings app.
We also allow access to the VPN settings under the same circumstances.
Signed-off-by: Mike Lockwood <lockwood@android.com>
