Revert "Handle emergency registration failure case"

This reverts commit b43e3703687c7f4c6249ac78916dd21606961689.

Reason for revert: CP shall handle this failure.

Bug: 298375302
Bug: 278183420
Change-Id: I049363530be18fbd2c565b0651cd6ceb15e3ed03
diff --git a/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelector.java b/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelector.java
index 3388c97..02cef12 100644
--- a/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelector.java
+++ b/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelector.java
@@ -83,7 +83,6 @@
 import android.telephony.emergency.EmergencyNumber;
 import android.telephony.ims.ImsManager;
 import android.telephony.ims.ImsMmTelManager;
-import android.telephony.ims.ImsReasonInfo;
 import android.telephony.ims.ProvisioningManager;
 import android.text.TextUtils;
 import android.util.LocalLog;
@@ -694,8 +693,7 @@
         mCancelSignal = new CancellationSignal();
         // In case dialing over Wi-Fi has failed, do not the change the domain preference.
         if (!wifiFailed) {
-            mLastPreferredNetworks = getNextPreferredNetworks(csPreferred, mTryEpsFallback,
-                    !startVoWifiTimer);
+            mLastPreferredNetworks = getNextPreferredNetworks(csPreferred, mTryEpsFallback);
         }
         mTryEpsFallback = false;
 
@@ -733,13 +731,11 @@
      *
      * @param csPreferred Indicates whether CS preferred scan is requested.
      * @param tryEpsFallback Indicates whether scan requested for EPS fallback.
-     * @param lastScanFailed Indicates whether this a scan request due to the failure of last scan
-     *        request.
      * @return The list of preferred network types.
      */
     @VisibleForTesting
     public @RadioAccessNetworkType List<Integer> getNextPreferredNetworks(boolean csPreferred,
-            boolean tryEpsFallback, boolean lastScanFailed) {
+            boolean tryEpsFallback) {
         if (mRequiresVoLteEnabled && !isAdvancedCallingSettingEnabled()) {
             // Emergency call over IMS is not supported.
             logi("getNextPreferredNetworks VoLte setting is not enabled.");
@@ -809,23 +805,6 @@
             }
         }
 
-        // There can be cases that dialing IMS call failed but the modem doesn't know this
-        // situation with some vendor solutions. For example, dialing failure due to the
-        // emergency registration failure.
-        // Remove the current RAT from the scan list to avoid modem select current PLMN.
-        // If the scan fails, the next scan will include this RAT again.
-        //
-        // TODO (b/278183420) Replace this with a better solution by adding indication
-        // of call setup failure to the scan request.
-        ImsReasonInfo reasonInfo = mSelectionAttributes.getPsDisconnectCause();
-        if (!lastScanFailed && reasonInfo != null
-                && reasonInfo.getCode() == ImsReasonInfo.CODE_LOCAL_NOT_REGISTERED) {
-            logi("getNextPreferredNetworks remove " + mLastNetworkType);
-            if (preferredNetworks.size() > 1) {
-                preferredNetworks.remove(Integer.valueOf(mLastNetworkType));
-            }
-        }
-
         return preferredNetworks;
     }
 
diff --git a/tests/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelectorTest.java b/tests/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelectorTest.java
index 9be85ed..14df0b1 100644
--- a/tests/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelectorTest.java
+++ b/tests/src/com/android/services/telephony/domainselection/EmergencyCallDomainSelectorTest.java
@@ -99,7 +99,6 @@
 import android.telephony.WwanSelectorCallback;
 import android.telephony.ims.ImsManager;
 import android.telephony.ims.ImsMmTelManager;
-import android.telephony.ims.ImsReasonInfo;
 import android.telephony.ims.ProvisioningManager;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.testing.TestableLooper;
@@ -1271,7 +1270,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false));
     }
 
     @Test
@@ -1285,7 +1284,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyPsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyPsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false));
     }
 
     @Test
@@ -1300,7 +1299,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(false, false));
     }
 
     @Test
@@ -1315,7 +1314,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyCsOnlyScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyCsOnlyScanList(mDomainSelector.getNextPreferredNetworks(false, false));
 
     }
 
@@ -1330,7 +1329,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1344,7 +1343,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1360,7 +1359,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1375,7 +1374,7 @@
 
         setupForScanListTest(bundle);
 
-        verifyCsOnlyScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyCsOnlyScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1392,7 +1391,7 @@
         bindImsService();
         processAllMessages();
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false));
     }
 
     @Test
@@ -1409,7 +1408,7 @@
         bindImsService();
         processAllMessages();
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(false, false));
     }
 
     @Test
@@ -1427,7 +1426,7 @@
         bindImsService();
         processAllMessages();
 
-        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(false, false, false));
+        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(false, false));
     }
 
     @Test
@@ -1444,7 +1443,7 @@
         bindImsService();
         processAllMessages();
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1461,7 +1460,7 @@
         bindImsService();
         processAllMessages();
 
-        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyCsPreferredScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1480,7 +1479,7 @@
         bindImsService();
         processAllMessages();
 
-        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(true, false, false));
+        verifyPsOnlyScanList(mDomainSelector.getNextPreferredNetworks(true, false));
     }
 
     @Test
@@ -1496,7 +1495,7 @@
 
         setupForScanListTest(bundle);
 
-        List<Integer> networks = mDomainSelector.getNextPreferredNetworks(false, true, false);
+        List<Integer> networks = mDomainSelector.getNextPreferredNetworks(false, true);
 
         assertFalse(networks.isEmpty());
         assertTrue(networks.contains(EUTRAN));
@@ -1652,36 +1651,6 @@
     }
 
     @Test
-    public void testDefaultEpsImsRegisteredSelectPsEmergencyRegFailed() throws Exception {
-        createSelector(SLOT_0_SUB_ID);
-        unsolBarringInfoChanged(false);
-
-        EmergencyRegResult regResult = getEmergencyRegResult(EUTRAN, REGISTRATION_STATE_HOME,
-                NetworkRegistrationInfo.DOMAIN_PS,
-                true, true, 0, 0, "", "");
-        SelectionAttributes attr = getSelectionAttributes(SLOT_0, SLOT_0_SUB_ID, regResult);
-        mDomainSelector.selectDomain(attr, mTransportSelectorCallback);
-        processAllMessages();
-
-        bindImsService();
-
-        verifyPsDialed();
-
-        attr = new SelectionAttributes.Builder(SLOT_0, SLOT_0_SUB_ID, SELECTOR_TYPE_CALLING)
-                .setEmergency(true)
-                .setEmergencyRegResult(regResult)
-                .setPsDisconnectCause(
-                        new ImsReasonInfo(ImsReasonInfo.CODE_LOCAL_NOT_REGISTERED, 0, null))
-                .build();
-        mDomainSelector.reselectDomain(attr);
-        processAllMessages();
-
-        verify(mWwanSelectorCallback, times(1)).onRequestEmergencyNetworkScan(
-                any(), anyInt(), any(), any());
-        assertFalse(mAccessNetwork.contains(EUTRAN));
-    }
-
-    @Test
     public void testMaxCellularTimeout() throws Exception {
         PersistableBundle bundle = getDefaultPersistableBundle();
         bundle.putBoolean(KEY_EMERGENCY_CALL_OVER_EMERGENCY_PDN_BOOL, true);