- Android Support v4 (Development Framework) 
              The Android Support Library is not actually a single library, but rather a collection of libraries that can roughly be divided into two groups: compatibility and component libraries. For details, please see 
Understanding the Android Support Library.
 
            - AndroidX Activity (Utility) 
              provides the base Activity subclass and the relevant hooks to build a composable structure on top.
 
            - AppCompat (Utility) 
              support newer Android features on older Android versions.
 
            - Constraint Layout Library (Utility) 
              library to reduce the number of nested views needed.
 
            - Coordinatorlayout (UI Component) 
              AndroidX library to position top-level application widgets, such as AppBarLayout and FloatingActionButton.
 
            - Androidx Core (Utility) 
              a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs.
 
            - Android Emoji2 Compat (UI Component) 
              core library to enable emoji compatibility in Kitkat and newer devices to avoid the empty emoji characters.
 
            - AndroidX Fragment (UI Component) 
              AndroidX library to encapsulate part of the user interface or behavior into reusable components.
 
            - Lifecycle (Utility) 
              perform actions in response to a change in the lifecycle status of another component, such as activities and fragments.
 
            - Preference (Utility) 
              a library to build interactive settings screens without needing to interact with device storage or manage the UI.
 
            - ProfileInstaller (Utility) 
              AndroidX library that enables libraries to prepopulate ahead of time compilation traces to be read by ART.
 
            - Recyclerview (Utility) 
              display large sets of data in your UI while minimizing memory usage.
 
            - Android Activity Saved State (Utility) 
              provides the base Activity subclass and the relevant hooks to build a composable structure on top.
 
            - Startup (Utility) 
              AndroidX library to implement a straightforward, performant way to initialize components at app startup.
 
            - Android Jetpack VersionedParcelable (Utility) 
              Provides a stable but relatively compact binary serialization format that can be passed across processes or persisted safely.
 
            - AndroidX Widget ViewPager2 (UI Component) 
              replaces AndroidX ViewPager, addressing most of its predecessor’s pain-points, including right-to-left layout support, vertical orientation, modifiable Fragment collections, etc.
 
            - Google Material Design (Utility) 
              library to help with material design guidelines.