Update website build to use PackageInstaller.

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

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2023 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.util
+
+import android.app.DownloadManager
+import android.content.Context
+
+fun Context.getDownloadManager(): DownloadManager {
+  return this.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
+}

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

@@ -181,6 +181,10 @@ inline fun Cursor.forEach(operation: (Cursor) -> Unit) {
   }
 }
 
+fun Cursor.iterable(): Iterable<Cursor> {
+  return CursorIterable(this)
+}
+
 fun Boolean.toInt(): Int = if (this) 1 else 0
 
 /**
@@ -202,3 +206,23 @@ fun Cursor.rowToString(): String {
 
   return builder.toString()
 }
+
+private class CursorIterable(private val cursor: Cursor) : Iterable<Cursor> {
+  override fun iterator(): Iterator<Cursor> {
+    return CursorIterator(cursor)
+  }
+}
+
+private class CursorIterator(private val cursor: Cursor) : Iterator<Cursor> {
+  override fun hasNext(): Boolean {
+    return !cursor.isClosed && cursor.count > 0 && !cursor.isLast && !cursor.isAfterLast
+  }
+
+  override fun next(): Cursor {
+    return if (cursor.moveToNext()) {
+      cursor
+    } else {
+      throw NoSuchElementException()
+    }
+  }
+}