GmsCore | Free implementation of Play Services | Android library

adb shell
su
# then confirm on the phone, then
mount -o rw,remount /

REPLACE="
/system_ext/priv-app/GoogleFeedback
/system_ext/priv-app/GoogleOneTimeInitializer
/system_ext/priv-app/GoogleServicesFramework
/system_ext/priv-app/SetupWizard
/system/system_ext/priv-app/GoogleFeedback
/system/system_ext/priv-app/GoogleOneTimeInitializer
/system/system_ext/priv-app/GoogleServicesFramework
/system/system_ext/priv-app/SetupWizard
"

E/DynamiteModule: Failed to load IDynamiteLoader from GmsCore: Application package com.google.android.gms not found

public class RejestracjaActivity extends AppCompatActivity {
    
        private Button mRegister;
        private EditText mEmail, mPassword, mName;
    
        private RadioGroup mRadioGroup;
    
        private FirebaseAuth mAuth;
        private FirebaseAuth.AuthStateListener firebaseAuthStateListener;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_rejestracja);
    
            mAuth = FirebaseAuth.getInstance();
            firebaseAuthStateListener = new FirebaseAuth.AuthStateListener() {
                @Override
                public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                    final FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
                    if (user != null) {
                        Intent intent = new Intent(RejestracjaActivity.this, MainActivity.class);
                        startActivity(intent);
                        finish();
                        return;
                    }
                }
            };
    
            mRegister = (Button) findViewById(R.id.register);
    
            mEmail = (EditText) findViewById(R.id.email);
            mPassword = (EditText) findViewById(R.id.password);
            mName = (EditText) findViewById(R.id.name);
    
            mRadioGroup = (RadioGroup) findViewById(R.id.radioGroup);
    
            mRegister.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    int selectId = mRadioGroup.getCheckedRadioButtonId();
    
                    final RadioButton radioButton = (RadioButton) findViewById(selectId);
    
                    if (radioButton.getText() == null) {
                        return;
                    }
    
                    final String email = mEmail.getText().toString();
                    final String password = mPassword.getText().toString();
                    final String name = mName.getText().toString();
                    mAuth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(RejestracjaActivity.this, new OnCompleteListener<AuthResult>() {
                        @Override
                        public void onComplete(@NonNull Task<AuthResult> task) {
                            if (!task.isSuccessful()) {
                                Toast.makeText(RejestracjaActivity.this, "sign_up_error", Toast.LENGTH_SHORT).show();
                            } else {
                                String userId = mAuth.getCurrentUser().getUid();
                                //reference to database
                                DatabaseReference currentUserDb = FirebaseDatabase.getInstance().getReference().child("Users").child(userId);
                                Map userInfo = new HashMap<>();
                                userInfo.put("name", name);
                                userInfo.put("płeć", radioButton.getText().toString());
                                userInfo.put("profileImageUrl", "default");
                                currentUserDb.updateChildren(userInfo);
                            }
                        }
                    });
                }
            });
        }
    
        @Override
        protected void onStart() {
            super.onStart();
            mAuth.addAuthStateListener(firebaseAuthStateListener);
        }
    
        @Override
        protected void onStop() {
            super.onStop();
            mAuth.removeAuthStateListener(firebaseAuthStateListener);
        }
    }

currentUserDb.setValue(name);