Remove TelephonyManagerConstants

- Must migrated to TelephonyManager directly
- Except NETWORK_MODE_UNKNOWN not in TelephonyManager, moved to
  newly created NetworkModes
- Move addNrToLteNetworkMode() and reduceNrToLteNetworkMode() to
  NetworkModes and adding tests

Bug: 373771849
Flag: EXEMPT refactor
Test: manual - on sims settings
Test: unit tests
Change-Id: I0781a59905415aa7896510ad086d19da48e8ba37

tests/spa_unit/src/com/android/settings/network/telephony/mode/NetworkModesTest.kt

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network.telephony.mode
+
+import android.telephony.TelephonyManager
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class NetworkModesTest {
+
+    @Test
+    fun addNrToLteNetworkMode_lteOnly() {
+        val nrNetworkMode =
+            NetworkModes.addNrToLteNetworkMode(TelephonyManager.NETWORK_MODE_LTE_ONLY)
+
+        assertThat(nrNetworkMode).isEqualTo(TelephonyManager.NETWORK_MODE_NR_LTE)
+    }
+
+    @Test
+    fun addNrToLteNetworkMode_lteCdmaEvdo() {
+        val nrNetworkMode =
+            NetworkModes.addNrToLteNetworkMode(TelephonyManager.NETWORK_MODE_LTE_CDMA_EVDO)
+
+        assertThat(nrNetworkMode).isEqualTo(TelephonyManager.NETWORK_MODE_NR_LTE_CDMA_EVDO)
+    }
+
+    @Test
+    fun reduceNrToLteNetworkMode_nrLte() {
+        val lteNetworkMode =
+            NetworkModes.reduceNrToLteNetworkMode(TelephonyManager.NETWORK_MODE_NR_LTE)
+
+        assertThat(lteNetworkMode).isEqualTo(TelephonyManager.NETWORK_MODE_LTE_ONLY)
+    }
+
+    @Test
+    fun reduceNrToLteNetworkMode_nrLteCdmaEvdo() {
+        val lteNetworkMode =
+            NetworkModes.reduceNrToLteNetworkMode(TelephonyManager.NETWORK_MODE_NR_LTE_CDMA_EVDO)
+
+        assertThat(lteNetworkMode).isEqualTo(TelephonyManager.NETWORK_MODE_LTE_CDMA_EVDO)
+    }
+}