Signed out screen: add account info.

Display the account which has been signed out, using the `AccountInfoCard`. The data comes
from the session database, including the stored avatar thumbnail, since there is no Matrix
client available to load the avatar. `SignedOutState.signedOutSession` is now a non-null
`MatrixUser`, defaulting to a user with only the session id.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

features/signedout/impl/build.gradle.kts

@@ -16,6 +16,12 @@ plugins {
 
 android {
     namespace = "io.element.android.features.signedout.impl"
+
+    testOptions {
+        unitTests {
+            isIncludeAndroidResources = true
+        }
+    }
 }
 
 setupDependencyInjection()
@@ -30,7 +36,7 @@ dependencies {
     implementation(projects.libraries.sessionStorage.api)
     implementation(projects.libraries.uiStrings)
 
-    testCommonDependencies(libs)
+    testCommonDependencies(libs, true)
     testImplementation(projects.libraries.matrix.test)
     testImplementation(projects.libraries.sessionStorage.test)
 }