A lot of changes and additions

[kairusds]

This pull request has over 2 months worth of changes so I'm just going to list all of them:

Added

• Added Firebase (Analytics, Crashlytics and Cloud Messaging)
• Added SettingsFragment for the new SettingsMenu along with the BackPressListener interface
• Added support for Android 11+ devices (along with the new manage external storage permission)
• Added proper issue templates (Bug report, Feature request)
• Added WebViewFragment (for the in-game profile and other features that require sites to be shown in-game in the future)
• Added LoadingScreen for Android UI/Game related operations that takes some time to execute
• Added new updater based on the repository's GitHub Releases[^1]
• Add receiveAnnouncements option for receiving push notifications
• safebeatmapbg option for replacing(only in-game not image file) all beatmaps' background with the current skin's menu-background image
• trianglesAnimation option for toggling the visibility of TriangleEffectViews
• Added FileUtils helper for faster file-related operations
• SkinPathPreference for the skinPath option since adding reloadSkinsList() to SettingsMenu crashes the game
• Animations for fragment_settings.xml: rotate_360.xml, slide_in_left.xml, slide_in_right.xml
• Drawables for fragment_settings.xml and fragment_webview.xml: back_black.png, close_black.png
• Added auto clicker detection

Removed

• UmengSDK
• Tencent SDK's
• Unused options
• utdid4
• libaudio-tools
• circle.mp3

Changes

• Use HTTPS protocol for all web-related operations
• Updated Gradle wrapper version to 7.1
• Updated AndroidManifest.xml: compileSdkVersion 30, targetSdkVersion 29, minSdkVersion 21
• Changed JDK setup version to 11 on the android.yml workflow
• Changed default skin sound files from .wav and .mp3 to .ogg to reduce app size
• Changed number EditTextPreferences to SeekBarPreferences
• Rename sound option to beatmapSounds since it confuses the compiler for the sound PreferenceScreen
• Move hideReplayMarquee and hideInGameUI to general PreferenceScreen
• Incorporate @Rian8337's showProgressBar into hideInGameUi
• Updated gradle and library dependencies
• Updated SecurityUtils to not use the deprecated PackageManager.GET_SIGNATURES API on Android >= 9 and add a backport for lower versions
• Changed several classes that lists files/folders to use FileUtils
• Updated OdrConfig and OdrDatabase to use the paths from Config
• Updated @attenzione's ColorPickerPreference library
• Use androidx.preferences for backwards compatibility
• Updated BuildTypeNoticeFragment to use requireContext() instead of context!!
• Changed orderText to orderButton from FilterMenuFragment to make it clear that it's clickable
• Use int values for Snackbar duration since using the LENGTH constants fails the lint check[^2]
• Prompt users before opening a site link from the MainScene
• Updated BassAudioProvider and BassSoundProvider to have a dynamic volume so that the client won't need to restart when the volume options are changed
• Updated ToastLogger to not be a Runnable and execute Toast.makeText() in showText instead
• Use okio on classes that read human-readable files for faster file reading speeds
• Remove default value declarations from Config
• Updated LibraryManager to be more efficient
• Changed the typeAuto parameter to unranked from GameMod
• Use FPSCounter instead of FPSLogger from GameScene
• Show the play-unranked sprite instead of showing a Toast at the end of a game session for unranked mods and features
• Prevent crash with unplayable sound files (thanks to un4seen's BASS library update)
• Added FadeOutModifier to SplashScene and LoadingScene to make it snappier
• Updated OnlineFileOperator to use the game's signed signature to prevent unauthorized score submissions
• Use WebViewFragment for viewing profiles from OnlinePanel
• Use okhttp on PostBuilder, OnlineManager and OnlineFileOperator
• Disable AndEngine's debug logging methods on non-debug release builds

Footnotes

[^1]: The updater checks for the latest release of the repository and fetches the version code from the contents of the info.json asset file to compare it with the client's version code then searches for the .apk asset file.

info.json example:

{
  "version_code": 1434344258
}

[^2]: Thanks to this Stack Overflow answer for providing the correct values