react-native-video: Build failures on Android after upgrading from 6.0.0-alpha.4 to 6.0.0-beta.0

Ever since upgrading to 6.0.0-beta.0, I am unable to build our app on Android successfully. Here are the errors:

BUILD FAILED in 8s

error Failed to install the app. Make sure you have the Android development environment set up: https://reactnative.dev/docs/environment-setup.
Error: Command failed: ./gradlew app:installDebug -PreactNativeDevServerPort=8081
/Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java:25: error: package androidx.activity does not exist
import androidx.activity.OnBackPressedCallback;
                        ^
/Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/FullScreenPlayerView.java:9: error: package androidx.activity does not exist
import androidx.activity.OnBackPressedCallback;
                        ^
/Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/FullScreenPlayerView.java:17: error: cannot find symbol
    private final OnBackPressedCallback onBackPressedCallback;
                  ^
  symbol:   class OnBackPressedCallback
  location: class FullScreenPlayerView
/Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/FullScreenPlayerView.java:19: error: cannot find symbol
    public FullScreenPlayerView(Context context, ExoPlayerView exoPlayerView, LegacyPlayerControlView playerControlView, OnBackPressedCallback onBackPressedCallback) {
                                                                                                                         ^
  symbol:   class OnBackPressedCallback
  location: class FullScreenPlayerView
/Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java:400: error: cannot find symbol
            fullScreenPlayerView = new FullScreenPlayerView(getContext(), exoPlayerView, playerControlView, new OnBackPressedCallback(true) {
                                                                                                                ^
  symbol:   class OnBackPressedCallback
  location: class ReactExoplayerView
/Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java:401: error: method does not override or implement a method from a supertype
                @Override
                ^
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /Users/mitcheldowney/repos/podverse-rn/node_modules/react-native-video/android/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
6 errors

I have tried the Android specific steps in the installation docs, but my changes seem to have no effect. I get the same 6 errors every time.

It seemed like this PR https://github.com/react-native-video/react-native-video/pull/3376 might be related, so I tried checking out the master branch from that commit, but I still get the same issues.

Does anyone have insight into what we need to do differently to get this working? Our .gradle files can be found here: https://github.com/podverse/podverse-rn/tree/develop/android