Display only valid emojis in recent emoji list (#5612)

* Create `:libraries:recentemojis` and move `AddRecentEmoji` and `GetRecentEmojis` there

- Make sure `GetRecentEmojis` won't return duplicate or invalid emojis.
- `ActionListPresenter` now handles merging suggested and recent emojis, not `ActionListView`.

libraries/recentemojis/test/build.gradle.kts

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2023, 2024 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+plugins {
+    id("io.element.android-library")
+}
+
+android {
+    namespace = "io.element.android.libraries.recentemojis.test"
+}
+
+dependencies {
+    api(projects.libraries.matrix.api)
+    api(libs.coroutines.core)
+
+    implementation(libs.kotlinx.collections.immutable)
+    implementation(libs.coroutines.test)
+    implementation(projects.tests.testutils)
+    implementation(projects.libraries.recentemojis.api)
+    implementation(libs.matrix.emojibase.bindings)
+}

libraries/recentemojis/test/src/main/kotlin/io/element/android/libraries/recentemojis/test/FakeEmojibaseProvider.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2025 New Vector 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.recentemojis.test
+
+import io.element.android.emojibasebindings.Emoji
+import io.element.android.emojibasebindings.EmojibaseCategory
+import io.element.android.emojibasebindings.EmojibaseStore
+import io.element.android.libraries.recentemojis.api.EmojibaseProvider
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toPersistentMap
+
+class FakeEmojibaseProvider(
+    val emojis: Map<EmojibaseCategory, ImmutableList<Emoji>> = mapOf(),
+) : EmojibaseProvider {
+    override val emojibaseStore: EmojibaseStore
+        get() = EmojibaseStore(emojis.toPersistentMap())
+}