API modules do not need to setup dependency injection.

Move the implementation to the impl modules.

libraries/mediaupload/test/src/main/kotlin/io/element/android/libraries/mediaupload/test/FakeMediaSender.kt

@@ -0,0 +1,64 @@
+/*
+ * 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.mediaupload.test
+
+import android.net.Uri
+import io.element.android.libraries.matrix.api.core.EventId
+import io.element.android.libraries.mediaupload.api.MediaOptimizationConfig
+import io.element.android.libraries.mediaupload.api.MediaSender
+import io.element.android.libraries.mediaupload.api.MediaUploadInfo
+import io.element.android.tests.testutils.lambda.lambdaError
+
+class FakeMediaSender(
+    private val preProcessMediaResult: () -> Result<MediaUploadInfo> = { lambdaError() },
+    private val sendPreProcessedMediaResult: () -> Result<Unit> = { lambdaError() },
+    private val sendMediaResult: () -> Result<Unit> = { lambdaError() },
+    private val sendVoiceMessageResult: () -> Result<Unit> = { lambdaError() },
+    private val cleanUpResult: () -> Unit = { lambdaError() },
+) : MediaSender {
+    override suspend fun preProcessMedia(
+        uri: Uri,
+        mimeType: String,
+        mediaOptimizationConfig: MediaOptimizationConfig,
+    ): Result<MediaUploadInfo> {
+        return preProcessMediaResult()
+    }
+
+    override suspend fun sendPreProcessedMedia(
+        mediaUploadInfo: MediaUploadInfo,
+        caption: String?,
+        formattedCaption: String?,
+        inReplyToEventId: EventId?,
+    ): Result<Unit> {
+        return sendPreProcessedMediaResult()
+    }
+
+    override suspend fun sendMedia(
+        uri: Uri,
+        mimeType: String,
+        caption: String?,
+        formattedCaption: String?,
+        inReplyToEventId: EventId?,
+        mediaOptimizationConfig: MediaOptimizationConfig,
+    ): Result<Unit> {
+        return sendMediaResult()
+    }
+
+    override suspend fun sendVoiceMessage(
+        uri: Uri,
+        mimeType: String,
+        waveForm: List<Float>,
+        inReplyToEventId: EventId?,
+    ): Result<Unit> {
+        return sendVoiceMessageResult()
+    }
+
+    override fun cleanUp() {
+        cleanUpResult()
+    }
+}