Move SessionData.toMatrixUser() extension to a common place, then use it across the codebase.

libraries/accountselect/impl/src/main/kotlin/io/element/android/libraries/accountselect/impl/AccountSelectPresenter.kt

@@ -13,8 +13,8 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.produceState
 import dev.zacsweers.metro.Inject
 import io.element.android.libraries.architecture.Presenter
-import io.element.android.libraries.matrix.api.core.UserId
 import io.element.android.libraries.matrix.api.user.MatrixUser
+import io.element.android.libraries.matrix.api.user.toMatrixUser
 import io.element.android.libraries.sessionstorage.api.SessionStore
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.persistentListOf
@@ -29,14 +29,7 @@ class AccountSelectPresenter(
         val accounts by produceState<ImmutableList<MatrixUser>>(persistentListOf()) {
             // Do not use sessionStore.sessionsFlow() to not make it change when an account is selected.
             value = sessionStore.getAllSessions()
-                .map {
-                    MatrixUser(
-                        userId = UserId(it.userId),
-                        displayName = it.userDisplayName,
-                        avatarUrl = it.userAvatarUrl,
-                        avatarThumbnail = it.userAvatarData,
-                    )
-                }
+                .map { it.toMatrixUser() }
                 .toImmutableList()
         }