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

tests/unit/src/com/android/settings/wifi/tether/WifiTetherMaximizeCompatibilityPreferenceControllerTest.java

@@ -237,4 +237,11 @@ public class WifiTetherMaximizeCompatibilityPreferenceControllerTest {
 
         assertThat(builder.build().getBand()).isEqualTo(SoftApConfiguration.BAND_2GHZ);
     }
+
+    @Test
+    public void isAvailable_shouldHidePreference_returnFalse() {
+        mController.mShouldHidePreference = true;
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
 }

tests/unit/src/com/android/settings/wifi/tether/WifiTetherSecurityPreferenceControllerTest.java

@@ -203,4 +203,11 @@ public class WifiTetherSecurityPreferenceControllerTest {
                 .isEqualTo(SoftApConfiguration.SECURITY_TYPE_WPA2_PSK);
         assertThat(mPreference.getSummary().toString()).isEqualTo("WPA2-Personal");
     }
+
+    @Test
+    public void isAvailable_shouldHidePreference_returnFalse() {
+        mController.mShouldHidePreference = true;
+
+        assertThat(mController.isAvailable()).isFalse();
+    }
 }

tests/unit/src/com/android/settings/wifi/tether/WifiTetherViewModelTest.java

@@ -72,7 +72,10 @@ public class WifiTetherViewModelTest {
     }
 
     @Test
-    public void onCleared_setAutoRefreshFalse() {
+    public void onCleared_removeObservers() {
+        mViewModel.getSecuritySummary();
+        mViewModel.getSpeedSummary();
+
         mViewModel.onCleared();
 
         verify(mSecurityType).removeObserver(mViewModel.mSecurityTypeObserver);
@@ -116,4 +119,11 @@ public class WifiTetherViewModelTest {
         assertThat(mViewModel.mSpeedSummary).isNotNull();
         verify(mSpeedType).observeForever(mViewModel.mSpeedTypeObserver);
     }
+
+    @Test
+    public void isSpeedFeatureAvailable_verifyRepositoryIsCalled() {
+        mViewModel.isSpeedFeatureAvailable();
+
+        verify(mWifiHotspotRepository).isSpeedFeatureAvailable();
+    }
 }