Fix media descriptions being wrapped with string

app/src/main/java/com/h/pixeldroid/postCreation/PostCreationActivity.kt

@@ -284,7 +284,11 @@ class PostCreationActivity : BaseActivity() {
                 }
 
             var postSub: Disposable? = null
-            val inter = pixelfedAPI.mediaUpload("Bearer $accessToken", data.imageDescription, requestBody.parts[0])
+
+            val description = data.imageDescription?.let { MultipartBody.Part.createFormData("description", it) }
+
+
+            val inter = pixelfedAPI.mediaUpload("Bearer $accessToken", description, requestBody.parts[0])
 
             postSub = inter
                 .subscribeOn(Schedulers.io())

app/src/main/java/com/h/pixeldroid/utils/api/PixelfedAPI.kt

@@ -256,7 +256,7 @@ interface PixelfedAPI {
     fun mediaUpload(
         //The authorization header needs to be of the form "Bearer <token>"
         @Header("Authorization") authorization: String,
-        @Part("description") description: String?,
+        @Part description: MultipartBody.Part? = null,
         @Part file: MultipartBody.Part
     ): Observable<Attachment>