avatar: handle null bitmap

Change-Id: Ibc4601b40dbcd7c2ade6df360a5ff76fc88a07ae

ring-android/app/src/main/java/cx/ring/views/AvatarFactory.kt

@@ -96,7 +96,7 @@ object AvatarFactory {
             .map { d -> BitmapUtils.drawableToBitmap(d, size) }
     }
 
-    private fun getDrawable(context: Context, photo: Bitmap, profileName: String?, username: String?, id: String): Drawable {
+    private fun getDrawable(context: Context, photo: Bitmap?, profileName: String?, username: String?, id: String): Drawable {
         return AvatarDrawable.Builder()
             .withPhoto(photo)
             .withName(if (TextUtils.isEmpty(profileName)) username else profileName)
@@ -107,12 +107,12 @@ object AvatarFactory {
 
     fun clearCache() {}
 
-    private fun <T> getGlideRequest(context: Context, request: RequestBuilder<T>, photo: Bitmap, profileName: String?, username: String?, id: String): RequestBuilder<T> {
+    private fun <T> getGlideRequest(context: Context, request: RequestBuilder<T>, photo: Bitmap?, profileName: String?, username: String?, id: String): RequestBuilder<T> {
         return request.load(getDrawable(context, photo, profileName, username, id))
     }
 
     private fun getGlideAvatar(context: Context, manager: RequestManager, contact: Contact): RequestBuilder<Drawable> {
-        return getGlideRequest(context, manager.asDrawable(), contact.photo as Bitmap, contact.profileName, contact.username, contact.primaryNumber)
+        return getGlideRequest(context, manager.asDrawable(), contact.photo as Bitmap?, contact.profileName, contact.username, contact.primaryNumber)
     }
 
     private fun getGlideAvatar(context: Context, contact: Contact): RequestBuilder<Drawable> {