Fix not collapsing appbar on some screens when dragging scroller

app/src/main/java/org/koitharu/kotatsu/history/ui/HistoryActivity.kt

@@ -8,11 +8,18 @@ import androidx.core.graphics.Insets
 import androidx.core.view.updateLayoutParams
 import androidx.core.view.updatePadding
 import androidx.fragment.app.commit
+import com.google.android.material.appbar.AppBarLayout
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseActivity
 import org.koitharu.kotatsu.databinding.ActivityContainerBinding
+import org.koitharu.kotatsu.main.ui.AppBarOwner
 
-class HistoryActivity : BaseActivity<ActivityContainerBinding>() {
+class HistoryActivity :
+	BaseActivity<ActivityContainerBinding>(),
+	AppBarOwner {
+
+	override val appBar: AppBarLayout
+		get() = binding.appbar
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
@@ -42,4 +49,4 @@ class HistoryActivity : BaseActivity<ActivityContainerBinding>() {
 
 		fun newIntent(context: Context) = Intent(context, HistoryActivity::class.java)
 	}
-}
+}

app/src/main/java/org/koitharu/kotatsu/suggestions/ui/SuggestionsActivity.kt

@@ -8,11 +8,18 @@ import androidx.core.graphics.Insets
 import androidx.core.view.updateLayoutParams
 import androidx.core.view.updatePadding
 import androidx.fragment.app.commit
+import com.google.android.material.appbar.AppBarLayout
 import org.koitharu.kotatsu.R
 import org.koitharu.kotatsu.base.ui.BaseActivity
 import org.koitharu.kotatsu.databinding.ActivityContainerBinding
+import org.koitharu.kotatsu.main.ui.AppBarOwner
 
-class SuggestionsActivity : BaseActivity<ActivityContainerBinding>() {
+class SuggestionsActivity :
+	BaseActivity<ActivityContainerBinding>(),
+	AppBarOwner {
+
+	override val appBar: AppBarLayout
+		get() = binding.appbar
 
 	override fun onCreate(savedInstanceState: Bundle?) {
 		super.onCreate(savedInstanceState)
@@ -42,4 +49,4 @@ class SuggestionsActivity : BaseActivity<ActivityContainerBinding>() {
 
 		fun newIntent(context: Context) = Intent(context, SuggestionsActivity::class.java)
 	}
-}
+}

app/src/main/res/layout/activity_categories.xml

@@ -16,7 +16,7 @@
 			style="?attr/collapsingToolbarLayoutMediumStyle"
 			android:layout_width="match_parent"
 			android:layout_height="?attr/collapsingToolbarLayoutMediumSize"
-			app:layout_scrollFlags="scroll|exitUntilCollapsed"
+			app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
 			app:toolbarId="@id/toolbar">
 
 			<com.google.android.material.appbar.MaterialToolbar