Ensure that pinned_order is unique.

core-util/src/main/java/org/signal/core/util/CursorExtensions.kt

@@ -1,6 +1,7 @@
 package org.signal.core.util
 
 import android.database.Cursor
+import androidx.core.database.getIntOrNull
 import androidx.core.database.getLongOrNull
 import androidx.core.database.getStringOrNull
 import java.util.Optional
@@ -21,6 +22,10 @@ fun Cursor.requireInt(column: String): Int {
   return CursorUtil.requireInt(this, column)
 }
 
+fun Cursor.requireIntOrNull(column: String): Int? {
+  return this.getIntOrNull(this.getColumnIndexOrThrow(column))
+}
+
 fun Cursor.optionalInt(column: String): Optional<Int> {
   return CursorUtil.getInt(this, column)
 }
@@ -123,6 +128,16 @@ fun Cursor.readToSingleInt(defaultValue: Int = 0): Int {
   }
 }
 
+fun Cursor.readToSingleIntOrNull(): Int? {
+  return use {
+    if (it.moveToFirst()) {
+      it.getIntOrNull(0)
+    } else {
+      null
+    }
+  }
+}
+
 fun Cursor.readToSingleBoolean(defaultValue: Boolean = false): Boolean {
   return use {
     if (it.moveToFirst()) {