title: How i can set Half Expanded state for my BottomSheet
body: <p>I have layout with bottom sheet. </p>
  
  <pre><code>&lt;androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/coordinator_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;com.google.android.material.appbar.AppBarLayout
          android:id="@+id/appbar"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"&gt;
  
          &lt;com.google.android.material.appbar.CollapsingToolbarLayout
              android:id="@+id/collapsing_toolbar"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              app:contentScrim="@color/colorPrimary"
              app:layout_scrollFlags="scroll|exitUntilCollapsed" /&gt;
      &lt;/com.google.android.material.appbar.AppBarLayout&gt;
  
  
      &lt;include layout="@layout/content_main_weather_map" /&gt;
  
      &lt;include layout="@layout/bottom_sheet" /&gt;
  
  &lt;/androidx.coordinatorlayout.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>Bottom sheet layout</p>
  
  <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:app="http://schemas.android.com/apk/res-auto"
          xmlns:tools="http://schemas.android.com/tools"
          android:id="@+id/bottom_sheet"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:background="@android:color/white"
          android:clipToPadding="true"
          app:behavior_peekHeight="80dp"
          app:layout_behavior="@string/bottom_sheet_behavior"&gt;
  
          &lt;LinearLayout
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical"&gt;
  
              &lt;androidx.recyclerview.widget.RecyclerView
                  android:id="@+id/weather_recycler"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                  android:layout_marginTop="8dp"
                  tools:listitem="@layout/item_weather" /&gt;
  
          &lt;/LinearLayout&gt;
  
  
      &lt;/androidx.core.widget.NestedScrollView&gt;
  </code></pre>
  
  <p>It is necessary for me that my bottom sheet opens first half, and after re-dragging it opens to full screen. How is it done in google maps app. But I have no idea how to do this.</p>