[android] add: Elevation shadows for floating placepages.

android/res/layout-land/activity_map.xml

@@ -32,6 +32,7 @@
 
   <com.mapswithme.maps.widget.placepage.PlacePageView
       android:id="@+id/info_box"
+      style="@style/MwmWidget.PlacePage.Floating"
       android:layout_width="360dp"
       android:layout_height="match_parent"
       android:layout_below="@+id/fl__routing"

android/res/layout-sw600dp-land/activity_map.xml

@@ -2,7 +2,8 @@
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                 xmlns:placePage="http://schemas.android.com/apk/res-auto"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent">
+                android:layout_height="match_parent"
+                android:clipToPadding="false">
 
   <FrameLayout
       android:id="@+id/map_fragment_container"
@@ -26,6 +27,7 @@
 
   <com.mapswithme.maps.widget.placepage.PlacePageView
       android:id="@+id/info_box"
+      style="@style/MwmWidget.PlacePage.Floating"
       android:layout_width="@dimen/panel_width"
       android:layout_height="wrap_content"
       android:layout_below="@+id/toolbar_search"

android/res/layout-sw720dp/activity_map.xml

@@ -26,6 +26,7 @@
 
   <com.mapswithme.maps.widget.placepage.PlacePageView
       android:id="@+id/info_box"
+      style="@style/MwmWidget.PlacePage.Floating"
       android:layout_width="@dimen/panel_width"
       android:layout_height="wrap_content"
       android:layout_margin="@dimen/margin_base"

android/res/values-v21/styles.xml

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-
   <style name="MwmWidget.FrameLayout.Elevation"/>
 
+  <style name="MwmWidget.PlacePage.Floating">
+    <item name="android:elevation">@dimen/appbar_elevation</item>
+    <item name="android:background">@color/bg_top_panels</item>
+  </style>
 </resources>

android/res/values/styles.xml

@@ -114,12 +114,16 @@
     <item name="android:clickable">false</item>
   </style>
 
-  <style name="MwmWidget.Button" />
+  <style name="MwmWidget.Button"/>
 
   <style name="MwmWidget.Button.Green">
     <item name="android:background">@drawable/bg_btn_green</item>
   </style>
 
+  <style name="MwmWidget.PlacePage"/>
+
+  <style name="MwmWidget.PlacePage.Floating"/>
+
   <style name="MwmWidget.PlacePage.EditText" parent="Widget.AppCompat.EditText">
     <item name="android:imeOptions">actionDone</item>
     <item name="android:textColor">@color/text_place_page</item>