Initial content scanner integration (#7139)

* Create a `ContentScanner` component:

- Add `:features:contentscanner:api` module with the interface.
- Implement the concrete component using the Rust SDK in `:libraries:matrix:impl`.

This can be used to both set up the content scanner media fetching in the SDK Client and manually scanning media sources from the Android side

* Create `ContentScannerUrlProvider` in a new `:features:contentscaner:api` module as a noop implementation

Use it as a placeholder for the code to instantiate a `RustContentScanner` with the fetched URL and set it as part of the SDK client.

* Expose the optional `ContentScanner` in the `@SessionScope`

* Split the storage part of the Element well-known retriever so it can be reused for the non-session bound retriever.

Also add the new `content_scanner_url` field to it.

This will be used by the enterprise code to fetch the actual content scanner url.

* Bump enterprise commit to have access to the actual content scanner url provider implementation

* Fix tests and lint issues

* Use the right namespace for `:features:contentscanner:api`, also use the right namespace for `impl`

---------

Co-authored-by: Benoit Marty <benoitm@element.io>

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/FakeMatrixClient.kt

@@ -38,6 +38,7 @@ import io.element.android.libraries.matrix.api.room.alias.ResolvedRoomAlias
 import io.element.android.libraries.matrix.api.room.location.BeaconInfoUpdate
 import io.element.android.libraries.matrix.api.roomdirectory.RoomDirectoryService
 import io.element.android.libraries.matrix.api.roomlist.RoomListService
+import io.element.android.libraries.matrix.api.scanner.ContentScanner
 import io.element.android.libraries.matrix.api.spaces.SpaceService
 import io.element.android.libraries.matrix.api.sync.SlidingSyncVersion
 import io.element.android.libraries.matrix.api.sync.SyncService
@@ -122,6 +123,7 @@ class FakeMatrixClient(
     private val getMapStyleUrlResult: () -> Result<String?> = { lambdaError() },
     private val getDatabaseSizesLambda: () -> Result<SdkStoreSizes> = { lambdaError() },
     private val resetWellKnownConfigLambda: () -> Result<Unit> = { lambdaError() },
+    override val contentScanner: ContentScanner? = null
 ) : MatrixClient {
     var setDisplayNameCalled: Boolean = false
         private set

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/scanner/FakeContentScanner.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2026 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.matrix.test.scanner
+
+import io.element.android.libraries.matrix.api.media.MediaSource
+import io.element.android.libraries.matrix.api.scanner.ContentScanner
+
+class FakeContentScanner(
+    private val scan: suspend (mediaSource: MediaSource) -> Result<Boolean> = { Result.success(true) },
+) : ContentScanner {
+    override suspend fun scan(mediaSource: MediaSource): Result<Boolean> {
+        return scan.invoke(mediaSource)
+    }
+}