URL-encode deep link path segments in DefaultDeepLinkCreator

Decode them later in `DefaultDeepLinkParser` too

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/text/TextUtils.kt

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.androidutils.text
+
+import java.net.URLDecoder
+import java.net.URLEncoder
+import java.nio.charset.Charset
+
+fun String.urlEncoded(charset: Charset = Charsets.UTF_8): String = URLEncoder.encode(this, charset.name())
+fun String.urlDecoded(charset: Charset = Charsets.UTF_8): String = URLDecoder.decode(this, charset.name())