Fallback to "Extended Compatibility" if Speed feature is not ready

- Fallback to the "Extended Compatibility" design when the following conditions occur
  - 5 GHz band is not supported on the device
  - 5 GHz SAP available channels cannot be obtained from WifiManager
  - 6 GHz SAP available channels cannot be obtained from WifiManager

Bug: 272450463
Test: manual test
atest -c WifiTetherSettingsTest
atest -c WifiTetherViewModelTest \
         WifiHotspotRepositoryTest \
         WifiTetherSecurityPreferenceControllerTest.java \
         WifiTetherMaximizeCompatibilityPreferenceControllerTest

Change-Id: If7c8c41ebe86f5e7d8e4737ab7a82d38c9d633de