Merge "Make CollapsingToolbarBaseActivity extend FragmentActivity" into sc-dev

import androidx.annotation.NonNull;

import androidx.annotation.Nullable;

import androidx.coordinatorlayout.widget.CoordinatorLayout;

import androidx.fragment.app.FragmentActivity;

import com.google.android.material.appbar.AppBarLayout;

import com.google.android.material.appbar.CollapsingToolbarLayout;

 * A base Activity that has a collapsing toolbar layout is used for the activities intending to

 * enable the collapsing toolbar function.

 */

public class CollapsingToolbarBaseActivity extends SettingsTransitionActivity implements

public class CollapsingToolbarBaseActivity extends FragmentActivity implements

        AppBarLayout.OnOffsetChangedListener {

    private static final int TOOLBAR_MAX_LINE_NUMBER = 2;