Use the SDK Client to check whether a homeserver is compatible (#5664)

* Use the SDK `Client` to check whether a HS is compatible

* Remove usage of unused `WellKnown`, keep `ElementWellKnown`

* Make `HomeServerLoginCompatibilityChecker.check` return `true/false` values to distinguish non-valid homeservers from a failed check

* Use `inMemoryStore` and `serverNameOrHomeserverUrl`

* Do some cleanup of `isValid` and `isWellknownValid`

* Make the debounce for starting the search a bit higher, as checking for the homeservers seems more resource-intensive now

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

@@ -0,0 +1,36 @@
+/*
+ * 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.matrix.impl.auth
+
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import dev.zacsweers.metro.Inject
+import io.element.android.libraries.core.extensions.runCatchingExceptions
+import io.element.android.libraries.matrix.api.auth.HomeServerLoginCompatibilityChecker
+import io.element.android.libraries.matrix.impl.ClientBuilderProvider
+import timber.log.Timber
+
+@ContributesBinding(AppScope::class)
+@Inject
+class RustHomeServerLoginCompatibilityChecker(
+    private val clientBuilderProvider: ClientBuilderProvider,
+) : HomeServerLoginCompatibilityChecker {
+    override suspend fun check(url: String): Result<Boolean> = runCatchingExceptions {
+        clientBuilderProvider.provide()
+            .inMemoryStore()
+            .serverNameOrHomeserverUrl(url)
+            .build()
+            .use {
+                it.homeserverLoginDetails()
+            }
+            .use {
+                Timber.d("Homeserver $url | OIDC: ${it.supportsOidcLogin()} | Password: ${it.supportsPasswordLogin()} | SSO: ${it.supportsSsoLogin()}")
+                it.supportsOidcLogin() || it.supportsPasswordLogin()
+            }
+    }
+}