Record and send voice messages (#1596)

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Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/core/src/main/kotlin/io/element/android/libraries/core/hash/Hash.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * 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 io.element.android.libraries.core.hash
+
+import java.security.MessageDigest
+import java.util.Locale
+
+/**
+ * Compute a Hash of a String, using md5 algorithm.
+ */
+fun String.md5() = try {
+    val digest = MessageDigest.getInstance("md5")
+    val locale = Locale.ROOT
+    digest.update(toByteArray())
+    digest.digest()
+        .joinToString("") { String.format(locale, "%02X", it) }
+        .lowercase(locale)
+} catch (exc: Exception) {
+    // Should not happen, but just in case
+    hashCode().toString()
+}