Adopt MaterialFastScroll from J2K fork

https://github.com/Jays2Kings/tachiyomiJ2K/commit/de8cb8c1b06db0862d85811dfefd8c26ee93e587

app/src/main/java/eu/kanade/tachiyomi/ui/library/MaterialFastScroll.kt

@@ -0,0 +1,29 @@
+package eu.kanade.tachiyomi.ui.library
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.MotionEvent
+import eu.davidea.fastscroller.FastScroller
+import eu.kanade.tachiyomi.R
+import eu.kanade.tachiyomi.util.system.dpToPx
+
+class MaterialFastScroll @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
+    FastScroller(context, attrs) {
+
+    init {
+        setViewsToUse(
+            R.layout.material_fastscroll, R.id.fast_scroller_bubble, R.id.fast_scroller_handle
+        )
+    }
+
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        if (isHidden) return false
+        return super.onTouchEvent(event)
+    }
+
+    override fun setBubbleAndHandlePosition(y: Float) {
+        super.setBubbleAndHandlePosition(y)
+        bubble.y = handle.y - bubble.height / 2f + handle.height / 2f
+        bubble.translationX = (-45).dpToPx.toFloat()
+    }
+}

app/src/main/res/drawable/material_bubble_drawable.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="38dp" />
+    <solid android:color="?colorPrimaryVariant" />
+    <size
+        android:width="30dp"
+        android:height="30dp" />
+</shape>

app/src/main/res/drawable/material_thumb_drawable.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_selected="true">
+        <shape android:shape="rectangle">
+            <corners android:radius="8dp" />
+            <solid android:color="?attr/colorAccent" />
+            <size android:width="6dp" android:height="54dp" />
+        </shape>
+    </item>
+    <item>
+        <shape android:shape="rectangle">
+            <corners android:radius="8dp" />
+            <solid android:color="@color/fast_scroller_handle_idle" />
+            <size android:width="6dp" android:height="54dp" />
+        </shape>
+    </item>
+</selector>

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

@@ -34,7 +34,7 @@
 
     </eu.kanade.tachiyomi.widget.ThemedSwipeRefreshLayout>
 
-    <eu.davidea.fastscroller.FastScroller
+    <eu.kanade.tachiyomi.ui.library.MaterialFastScroll
         android:id="@+id/fast_scroller"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"

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

@@ -18,7 +18,7 @@
 
     </eu.kanade.tachiyomi.widget.ThemedSwipeRefreshLayout>
 
-    <eu.davidea.fastscroller.FastScroller
+    <eu.kanade.tachiyomi.ui.library.MaterialFastScroll
         android:id="@+id/fast_scroller"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"

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

@@ -10,7 +10,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
-    <eu.davidea.fastscroller.FastScroller
+    <eu.kanade.tachiyomi.ui.library.MaterialFastScroll
         android:id="@+id/fast_scroller"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"

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

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="wrap_content"
+    android:layout_height="match_parent">
+
+    <View
+        android:id="@+id/fast_scroller_bar"
+        android:layout_width="7dp"
+        android:layout_height="match_parent"
+        android:layout_gravity="end"
+        android:background="@android:color/transparent" />
+
+    <RelativeLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end">
+
+        <!-- No margin, use padding at the handle -->
+        <com.google.android.material.textview.MaterialTextView
+            android:id="@+id/fast_scroller_bubble"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="end|center_vertical"
+            android:layout_toStartOf="@+id/fast_scroller_handle"
+            android:background="@drawable/material_bubble_drawable"
+            android:elevation="10dp"
+            android:gravity="center"
+            android:paddingStart="12dp"
+            android:paddingTop="8dp"
+            android:paddingEnd="12dp"
+            android:paddingBottom="8dp"
+            android:textColor="?attr/colorOnPrimary"
+            android:textSize="15sp"
+            android:visibility="gone"
+            tools:text="A"
+            tools:visibility="visible" />
+
+        <!-- Padding is here to have better grab -->
+        <ImageView
+            android:id="@+id/fast_scroller_handle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentEnd="true"
+            android:contentDescription="@null"
+            android:paddingStart="6dp"
+            android:paddingEnd="4dp"
+            android:src="@drawable/material_thumb_drawable" />
+
+    </RelativeLayout>
+
+</merge>

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

@@ -11,7 +11,7 @@
         android:layout_height="wrap_content"
         tools:listitem="@layout/source_main_controller_card_header" />
 
-    <eu.davidea.fastscroller.FastScroller
+    <eu.kanade.tachiyomi.ui.library.MaterialFastScroll
         android:id="@+id/fast_scroller"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"