Change permissions checks for setAirplaneMode.

Require NETWORK_SETTINGS (or NETWORK_SETUP_WIZARD) instead of the
legacy CONNECTIVITY_INTERNAL permission. The users are as follows:

- The system callers (Phone, Settings, SystemUI, VrSettings) all
  have NETWORK_SETTINGS.
- SetupWizard has NETWORK_SETUP_WIZARD
- sl4a has NETWORK_STACK

Bug: 115302596
Test: builds, boots, airplane mode via SystemUI works
Change-Id: I8ca40182bd8b5e3fd9a82296c0cc28de30ed4baf