fix #1449, do not wipe favorite items at fixing date taken values

app/src/main/kotlin/com/simplemobiletools/gallery/pro/extensions/Context.kt

@@ -781,11 +781,13 @@ fun Context.addPathToDB(path: String) {
             else -> TYPE_IMAGES
         }
 
+        val mediumDao = galleryDB.MediumDao()
+        val isFavorite = mediumDao.isFavorite(path)
         val videoDuration = if (type == TYPE_VIDEOS) path.getVideoDuration() else 0
         val medium = Medium(null, path.getFilenameFromPath(), path, path.getParentPath(), System.currentTimeMillis(), System.currentTimeMillis(),
-                File(path).length(), type, videoDuration, false, 0L)
+                File(path).length(), type, videoDuration, isFavorite, 0L)
         try {
-            galleryDB.MediumDao().insert(medium)
+            mediumDao.insert(medium)
         } catch (ignored: Exception) {
         }
     }.start()

app/src/main/kotlin/com/simplemobiletools/gallery/pro/interfaces/MediumDao.kt

@@ -21,6 +21,9 @@ interface MediumDao {
     @Query("SELECT filename, full_path, parent_path, last_modified, date_taken, size, type, video_duration, is_favorite, deleted_ts FROM media WHERE deleted_ts != 0")
     fun getDeletedMedia(): List<Medium>
 
+    @Query("SELECT is_favorite FROM media WHERE full_path = :path")
+    fun isFavorite(path: String): Boolean
+
     @Insert(onConflict = REPLACE)
     fun insert(medium: Medium)