removed hardcoded string

app/src/main/java/chat/rocket/android/userdetails/presentation/UserDetailsPresenter.kt

@@ -62,7 +62,7 @@ class UserDetailsPresenter @Inject constructor(
 
                     if (avatarUrl != null || username != null || name != null || utcOffset != null) {
                         view.showUserDetailsAndActions(
-                            avatarUrl = avatarUrl,
+                            avatarUrl = avatarUrl.toString(),
                             name = name,
                             username = username,
                             status = userEntity.status,

app/src/main/java/chat/rocket/android/userdetails/presentation/UserDetailsView.kt

@@ -16,7 +16,7 @@ interface UserDetailsView : LoadingView, MessageView {
      * @param isVideoCallAllowed True if the video call is allowed, false otherwise.
      */
     fun showUserDetailsAndActions(
-        avatarUrl: String?,
+        avatarUrl: String,
         name: String?,
         username: String?,
         status: String?,

app/src/main/java/chat/rocket/android/userdetails/ui/UserDetailsFragment.kt

@@ -79,7 +79,7 @@ class UserDetailsFragment : Fragment(), UserDetailsView {
     }
 
     override fun showUserDetailsAndActions(
-        avatarUrl: String?,
+        avatarUrl: String,
         name: String?,
         username: String?,
         status: String?,
@@ -103,7 +103,7 @@ class UserDetailsFragment : Fragment(), UserDetailsView {
         val userStatus = if(status != null) status.substring(0, 1).toUpperCase() + status.substring(1) else  ""
         text_description_status.text = userStatus
 
-        val userUtcOffset = if(utcOffset != "null") utcOffset else "None"
+        val userUtcOffset = if(utcOffset.equals("null")) getString(R.string.user_timezone_none) else utcOffset
         text_description_timezone.text = userUtcOffset
 
         text_video_call.isVisible = isVideoCallAllowed

app/src/main/res/values/strings.xml

@@ -381,6 +381,7 @@ https://github.com/RocketChat/java-code-styles/blob/master/CODING_STYLE.md#strin
     <string name="timezone">Timezone</string>
     <string name="status" translatable="false">Status: %1$s</string>
     <string name="user_detail_status" translatable="false">Status</string>
+    <string name="user_timezone_none" translatable="false">None</string>
 
     <!-- Report -->
     <string name="submit">Submit</string>