* upgrade to AndroidX, upgrade libraries
* move to MaterialComponents theme
* make sure the compose button looks good everywhere
* fix tollbar title/button alignment on tablet
* move to new material color theming, consolidate colors and themes
* fix build, fix imports
* set error on TextInputLayout instead of EditText
* fix imports, TootButton when
* improve snackbar style
* fix task description color
* Enforce 420-character limit on media descriptions in the UI
* Persist media descriptions with drafts
* Defer media description update until after upload finishes
* Make description field 2 lines for better visibility of hint text
* Reuse Gson instance
* Force retranslation of modified string "hint_describe_for_visually_impaired"
* Add bounds check when reading serialized media descriptions
* do not add media urls to status text
* add scrolling to content
* add arrow icon and animation to replying-to toggle
* remove unnecessary compose_button_colors.xml
* improve toot button
* improve bottom bar, add bottom sheet for compose options, dedicated cw button
* fix crash on Android < API 21
* move media picking from dialog to bottom sheet
* add small style tootbutton
* fix colors/button background for light theme
* add icons to media chose bottom sheet
* improve hide media button, delete unused styles
* fix crash on dev build when taking photo
* consolidate drawables
* consolidate strings and ids, add tooltips to buttons
* allow media only toots
* change error message to show max size of upload correctly
* fix button color
* add emoji
* code cleanup
* Merge branch 'master' into compose_activity_refactoring
# Conflicts:
# app/src/main/java/com/keylesspalace/tusky/ComposeActivity.java
* fix hidden snackbar
* improve hint text color
* add SendTootService
* fix timeline refreshing
* toot saving and error handling for sendtootservice
* restructure some code
* convert EditTextTyped to Kotlin
* fixed pick media button disabled color
* force sensitive media when content warning is shown
* add db cache for emojis & fix tests
* reorder buttons to match mastodon web
* add possibility to cancel sending of toot
* correctly delete sent toots
* refresh SavedTootActivity after toot was sent
* remove unused resources
* correct params for toot saving in SendTootService
* consolidate strings
* bugfix
* remove unused resources
* fix notifications on old android for SendTootService
* fix crash
