Add Start/Finish date support for MAL (#2672)

* Started working on MAL support

* Added date picker UI

* Replaced Date with Calendar

* Added MAL remote update functionality

* Join url methods listEntryUrl and editUrl

* Removed unused methods

* Renamed mangaEditPayload to mangaEditPostBody

* Moved code to separate method

* Uniformed code to project conventions

* Removed wildcard import

* Moved MyAnimeListTrack to private class

* Improved MyAnimeListTrack name

* Removed redundant code

* Add start/finish date in local database

* Fixed format and improved codestyle

* Fixed typo and fixed TrackHolder's format

* Improved code style

* Ran linter

* Add database updating methods

* Change date format to fit new layout

* Review Commits

* Improve SetTrackReadingDatesDialog readability

* Move private methods after public ones

* Fixed SQL error

* Fixed remove date button

* Updated MaterialDesign methods to latest version

* Replaced dismissDialog() with dialog.Dismiss()

* Fixed wrong string resource usage.

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

@@ -475,8 +475,11 @@
     <string name="status">Status</string>
     <string name="track_status">Status</string>
     <string name="track_start_date">Started</string>
+    <string name="track_started_reading_date">Started reading date</string>
+    <string name="track_finished_reading_date">Finished reading date</string>
     <string name="track_type">Type</string>
     <string name="track_author">Author</string>
+    <string name="error_invalid_date_supplied">Invalid date supplied</string>
     <string name="url_not_set">Manga URL not set, please click title and select manga again</string>
 
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