Change BottomNavigationView behavior (#5603)

Similar to app bar's scroll behavior

app/src/main/java/eu/kanade/tachiyomi/widget/HideBottomNavigationOnScrollBehavior.kt

@@ -0,0 +1,41 @@
+package eu.kanade.tachiyomi.widget
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import androidx.coordinatorlayout.widget.CoordinatorLayout
+import androidx.core.view.ViewCompat
+import com.google.android.material.bottomnavigation.BottomNavigationView
+
+/**
+ * Hide behavior similar to app bar for [BottomNavigationView]
+ */
+class HideBottomNavigationOnScrollBehavior @JvmOverloads constructor(
+    context: Context? = null,
+    attrs: AttributeSet? = null
+) : CoordinatorLayout.Behavior<BottomNavigationView>(context, attrs) {
+
+    override fun onStartNestedScroll(
+        coordinatorLayout: CoordinatorLayout,
+        child: BottomNavigationView,
+        directTargetChild: View,
+        target: View,
+        axes: Int,
+        type: Int
+    ): Boolean {
+        return axes == ViewCompat.SCROLL_AXIS_VERTICAL
+    }
+
+    override fun onNestedPreScroll(
+        coordinatorLayout: CoordinatorLayout,
+        child: BottomNavigationView,
+        target: View,
+        dx: Int,
+        dy: Int,
+        consumed: IntArray,
+        type: Int
+    ) {
+        super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type)
+        child.translationY = (child.translationY + dy).coerceIn(0F, child.height.toFloat())
+    }
+}