[Settings] Add voice call status and VoLTE mode detection into VoLTE UI test case

1. VoLTE UI should gray out during voice call.
2. UI should be invisible when VoLTE mode mismatch.

Bug: 172781455
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=Enhanced4gBasePreferenceControllerTest
Merged-In: I8b6a212dc727f1ab78f4dd280cb41966b7054180
(cherry picked from commit 227329b2f7)
Change-Id: I1bd239b6434038323a0689e2bc3bf05182bfcd45

src/com/android/settings/network/telephony/Enhanced4gBasePreferenceController.java

@@ -57,8 +57,7 @@ public class Enhanced4gBasePreferenceController extends TelephonyTogglePreferenc
     private boolean mShow5gLimitedDialog;
     boolean mIsNrEnabledFromCarrierConfig;
     private boolean mHas5gCapability;
-    @VisibleForTesting
+    private Integer mCallState;
-    Integer mCallState;
     private final List<On4gLteUpdateListener> m4gLteListeners;
 
     protected static final int MODE_NONE = -1;
@@ -199,8 +198,13 @@ public class Enhanced4gBasePreferenceController extends TelephonyTogglePreferenc
         return new VolteQueryImsState(mContext, subId);
     }
 
+    @VisibleForTesting
+    boolean isCallStateIdle() {
+        return (mCallState != null) && (mCallState == TelephonyManager.CALL_STATE_IDLE);
+    }
+
     private boolean isUserControlAllowed(final PersistableBundle carrierConfig) {
-        return (mCallState != null) && (mCallState == TelephonyManager.CALL_STATE_IDLE)
+        return isCallStateIdle()
                 && (carrierConfig != null)
                 && carrierConfig.getBoolean(
                 CarrierConfigManager.KEY_EDITABLE_ENHANCED_4G_LTE_BOOL);

tests/robotests/src/com/android/settings/network/telephony/Enhanced4gBasePreferenceControllerTest.java

@@ -79,6 +79,9 @@ public class Enhanced4gBasePreferenceControllerTest {
 
         mCarrierConfig = new PersistableBundle();
         doReturn(mCarrierConfig).when(mCarrierConfigManager).getConfigForSubId(SUB_ID);
+        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_HIDE_ENHANCED_4G_LTE_BOOL, false);
+        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_EDITABLE_ENHANCED_4G_LTE_BOOL, true);
+        mCarrierConfig.putInt(CarrierConfigManager.KEY_ENHANCED_4G_LTE_TITLE_VARIANT_INT, 1);
 
         mQueryImsState = spy(new MockVolteQueryImsState(mContext, SUB_ID));
         mQueryImsState.setEnabledByPlatform(true);
@@ -91,6 +94,8 @@ public class Enhanced4gBasePreferenceControllerTest {
         mController = spy(new Enhanced4gLtePreferenceController(mContext, "VoLTE"));
         mController.init(SUB_ID);
         doReturn(mQueryImsState).when(mController).queryImsState(anyInt());
+        doReturn(true).when(mController).isCallStateIdle();
+        doReturn(1).when(mController).getMode();
         mPreference.setKey(mController.getPreferenceKey());
     }
 
@@ -105,6 +110,16 @@ public class Enhanced4gBasePreferenceControllerTest {
                 BasePreferenceController.CONDITIONALLY_UNAVAILABLE);
     }
 
+    @Test
+    public void getAvailabilityStatus_modeMismatch_returnUnavailable() {
+        doReturn(2).when(mController).getMode();
+
+        mController.init(SUB_ID);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(
+                BasePreferenceController.CONDITIONALLY_UNAVAILABLE);
+    }
+
     @Test
     public void getAvailabilityStatus_volteDisabled_returnUnavailable() {
         mQueryImsState.setEnabledByPlatform(false);
@@ -115,17 +130,23 @@ public class Enhanced4gBasePreferenceControllerTest {
 
     @Test
     public void updateState_configEnabled_prefEnabled() {
-        mQueryImsState.setIsEnabledByUser(true);
         mPreference.setEnabled(false);
-        mCarrierConfig.putInt(CarrierConfigManager.KEY_ENHANCED_4G_LTE_TITLE_VARIANT_INT, 1);
-        mController.mCallState = TelephonyManager.CALL_STATE_IDLE;
-        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_EDITABLE_ENHANCED_4G_LTE_BOOL, true);
 
         mController.updateState(mPreference);
 
         assertThat(mPreference.isEnabled()).isTrue();
     }
 
+    @Test
+    public void updateState_callStateNotIdle_prefDisabled() {
+        doReturn(false).when(mController).isCallStateIdle();
+        mPreference.setEnabled(true);
+
+        mController.updateState(mPreference);
+
+        assertThat(mPreference.isEnabled()).isFalse();
+    }
+
     @Test
     public void updateState_configOn_prefChecked() {
         mQueryImsState.setIsEnabledByUser(true);