Sort in slot selectable subscriptions first

Then the ones that not in slot.

Bug: 340361264
Test: manual - on SIMs
Test: unit test
Change-Id: If7150bd2fa5c1b7d42fe34ef2e814ba540454ed8

src/com/android/settings/network/telephony/SubscriptionRepository.kt

@@ -124,6 +124,14 @@ fun Context.getSelectableSubscriptionInfoList(): List<SubscriptionInfo> {
             }
         }
         // Matching the sorting order in SubscriptionManagerService.getAvailableSubscriptionInfoList
-        .sortedWith(compareBy({ it.simSlotIndex }, { it.subscriptionId }))
+        .sortedWith(compareBy({ it.sortableSimSlotIndex }, { it.subscriptionId }))
         .also { Log.d(TAG, "getSelectableSubscriptionInfoList: $it") }
 }
+
+/** Subscription with invalid sim slot index has lowest sort order. */
+private val SubscriptionInfo.sortableSimSlotIndex: Int
+    get() = if (simSlotIndex != SubscriptionManager.INVALID_SIM_SLOT_INDEX) {
+        simSlotIndex
+    } else {
+        Int.MAX_VALUE
+    }

tests/spa_unit/src/com/android/settings/network/telephony/SubscriptionRepositoryTest.kt

@@ -115,6 +115,27 @@ class SubscriptionRepositoryTest {
             .containsExactly(SIM_SLOT_INDEX_0, SIM_SLOT_INDEX_1).inOrder()
     }
 
+    @Test
+    fun getSelectableSubscriptionInfoList_oneNotInSlot_inSlotSortedFirst() {
+        mockSubscriptionManager.stub {
+            on { getAvailableSubscriptionInfoList() } doReturn listOf(
+                SubscriptionInfo.Builder().apply {
+                    setSimSlotIndex(SubscriptionManager.INVALID_SIM_SLOT_INDEX)
+                    setId(SUB_ID_3_NOT_IN_SLOT)
+                }.build(),
+                SubscriptionInfo.Builder().apply {
+                    setSimSlotIndex(SIM_SLOT_INDEX_1)
+                    setId(SUB_ID_IN_SLOT_1)
+                }.build(),
+            )
+        }
+
+        val subInfos = context.getSelectableSubscriptionInfoList()
+
+        assertThat(subInfos.map { it.simSlotIndex })
+            .containsExactly(SIM_SLOT_INDEX_1, SubscriptionManager.INVALID_SIM_SLOT_INDEX).inOrder()
+    }
+
     @Test
     fun getSelectableSubscriptionInfoList_sameGroupAndOneHasSlot_returnTheOneWithSimSlotIndex() {
         mockSubscriptionManager.stub {