Use shared recent emoji reactions from account data (#5402)

* Use shared recent emoji reactions from account data

- Add `AddRecentEmoji` and `GetRecentEmojis` use cases to avoid injecting the whole `MatrixClient` for just one of these operations.
- Update the UI and logic of the emoji picker and message context menu to include the recent emojis.
- Add `CoroutineDispatchers.Default` with the defaults coroutines to use in the app for ease of use.

* Instead of replacing suggested emojis, concatenate recent ones removing duplicates

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/RustMatrixClient.kt

@@ -708,6 +708,18 @@ class RustMatrixClient(
         runCatchingExceptions { innerClient.getMaxMediaUploadSize().toLong() }
     }
 
+    override suspend fun addRecentEmoji(emoji: String): Result<Unit> = withContext(sessionDispatcher) {
+        runCatchingExceptions {
+            innerClient.addRecentEmoji(emoji)
+        }
+    }
+
+    override suspend fun getRecentEmojis(): Result<List<String>> = withContext(sessionDispatcher) {
+        runCatchingExceptions {
+            innerClient.getRecentEmojis().map { it.emoji }
+        }
+    }
+
     private suspend fun File.getCacheSize(
         includeCryptoDb: Boolean = false,
     ): Long = withContext(sessionDispatcher) {