🐛 [iOS] Fix the behavior of obtaining Live Photos

[AlexV525]

containsLivePhotos has been reverted to true and only has effects when the request type contains images which reduces the complexity of the querying conditions.

The PR also fixes cases when obtaining resource files and their titles.

• Fixes [BUG] iOS Preview shows original image instead of edited picture #1136
• Fixes [Bug report] When syncing cropped images from iCloud, isLocallyAvailable(isOrigin: true) always returns false. #1047
• Fixes [Bug report][iOS] For assets with adjustments/filters, return original name instead of FullSizeRender.* #976
• Fixes [BUG]iOS相册无法加载LivePhoto flutter_wechat_assets_picker#590
• Fixes [BUG] My photos don't show up on iOS flutter_wechat_assets_picker#588
• Fixes [BUG] New photos not shown after upgrading photo_manager flutter_wechat_assets_picker#576
• Fixes FullSizeRender.jpg bug (Image name/image path issue) flutter_wechat_assets_picker#555