Merge changes from topic "glide_for_photopicker" into sc-mainline-prod

* changes:
  Remove the shadow on the toolbar in PhotoPicker
  No-op refactoring of updateToolbar
  Don't show date headers when no items in PhotoPicker
  No-op refactor to remove unnecessary 'ForPicker' suffix
  Sync data from local and cloud providers into picker db
  Add the test for the order of Categories
  Add more tests for PickerViewModel
  Ignore ItemsProviderTest to unblock presubmit
  Fix navigation bar appearance
  Minor fixes
  Update the icon and colors in bottomBar of PhotoPicker
  Define MANAGE_CLOUD_MEDIA_PROVIDERS permission in MediaProvider
  No-op refactor of Items class
  Localize max count number for max selection flow
  Add a local PhotoPickerProvider
  Remove unnecessary permission checks in CloudMediaProvider
  Add BottomSheetBehavior for picker launch animation
  Enable PhotoPicker tests in presubmit
  Fix nits in PickerDbFacadeForPicker
  Add mime_type and size_bytes filtering support to the pickerdb
  Support updating the picker db
  Fix the flaky test by using the system time zone
  Relax local_id unique constraint for the picker db
  Do not animate thumbnails in photo grid view
  Get unreliable volume path
  Calculate the span count of recyclerview dynamically in picker
  Center align max selection message on the photo grid
  Update the toolbar and system bars for preview in Picker
  Add tabChips and support Albums tab
  Add AlbumsTabFragment
  Add some category methods
  Fix getItemViewType for PreviewAdapter
  Add "Select up to max items" label for max selection
  Add necessary permissions for UserIdManager
  No-op refactor deleted_media table upgrade
  Add overlay gradient for photos grid's item
  UI flow to support max selected items
  Remove local_dedupe_key from picker db
  Query external db for picker db sync
  Introduce the CloudMediaProvider API
  Support Video Preview
  Support mimeType filter for getCategories
  Support MIME type filters for ACTION_PICK_IMAGES
  Add support for downloads category for photopicker
  Load items in a background thread to not block PhotoPicker UI
  Move DateTimeUtils to util folder
  Glide calls are async and do not block the UI
  Use Glide for thumbnail and image loading
  Add the resources for toolbar and Albums tab
  Sort using date_modified if date_taken is null
  Introduce a deleted_media table for the photo picker