Move and refactor MatrixUser (#381)

Move and refactor MatrixUser

Instead of living in matrixui and having an AvatarData, this can
reside in the matrix module and just have the URL. An extension
method in matrixui can then provide the AvatarData when required.

This removes some small duplication, and pushes the UI-specific
information (i.e., what size of avatar is going to be rendered)
further down the stack. It also aligns the field names with those
used by the rust SDK (e.g. "displayName" instead of "userName").

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/MatrixClient.kt

@@ -26,7 +26,7 @@ import io.element.android.libraries.matrix.api.pusher.PushersService
 import io.element.android.libraries.matrix.api.room.MatrixRoom
 import io.element.android.libraries.matrix.api.room.RoomMembershipObserver
 import io.element.android.libraries.matrix.api.room.RoomSummaryDataSource
-import io.element.android.libraries.matrix.api.usersearch.MatrixSearchUserResults
+import io.element.android.libraries.matrix.api.user.MatrixSearchUserResults
 import io.element.android.libraries.matrix.api.verification.SessionVerificationService
 import java.io.Closeable
 

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/room/RoomMember.kt

@@ -17,6 +17,7 @@
 package io.element.android.libraries.matrix.api.room
 
 import io.element.android.libraries.matrix.api.core.UserId
+import io.element.android.libraries.matrix.api.user.MatrixUser
 
 data class RoomMember(
     val userId: UserId,
@@ -29,6 +30,12 @@ data class RoomMember(
     val isIgnored: Boolean,
 )
 
+fun RoomMember.toMatrixUser() = MatrixUser(
+    userId = userId,
+    displayName = displayName,
+    avatarUrl = avatarUrl,
+)
+
 enum class RoomMembershipState {
     BAN, INVITE, JOIN, KNOCK, LEAVE
 }

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/user/MatrixSearchUserResults.kt

@@ -14,9 +14,9 @@
  * limitations under the License.
  */
 
-package io.element.android.libraries.matrix.api.usersearch
+package io.element.android.libraries.matrix.api.user
 
 data class MatrixSearchUserResults(
-    val results: List<MatrixUserProfile>,
+    val results: List<MatrixUser>,
     val limited: Boolean,
 )

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/user/MatrixUser.kt

@@ -14,12 +14,15 @@
  * limitations under the License.
  */
 
-package io.element.android.libraries.matrix.api.usersearch
+package io.element.android.libraries.matrix.api.user
 
+import android.os.Parcelable
 import io.element.android.libraries.matrix.api.core.UserId
+import kotlinx.parcelize.Parcelize
 
-data class MatrixUserProfile(
+@Parcelize
+data class MatrixUser(
     val userId: UserId,
-    val displayName: String?,
-    val avatarUrl: String?
-)
+    val displayName: String? = null,
+    val avatarUrl: String? = null
+) : Parcelable