Add standard elevation to Toolbars

res/layout/contact_selection_activity.xml

@@ -12,6 +12,7 @@
             android:layout_width="match_parent"
             android:minHeight="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
+            android:elevation="4dp"
             android:theme="?attr/actionBarStyle"
             app:contentInsetStartWithNavigation="0dp"/>
 

res/layout/conversation_list_activity.xml

@@ -13,6 +13,7 @@
             android:layout_height="?attr/actionBarSize"
             android:minHeight="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
+            android:elevation="4dp"
             android:theme="?attr/actionBarStyle">
 
         <RelativeLayout
@@ -65,6 +66,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_alignParentTop="true"
+            android:elevation="4dp"
             android:visibility="invisible"
             tools:visibility="visible"/>
 

res/layout/invite_activity.xml

@@ -90,6 +90,7 @@
             android:layout_width="match_parent"
             android:minHeight="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
+            android:elevation="4dp"
             android:theme="@style/TextSecure.LightActionBar" />
 
         <fragment android:id="@+id/contact_selection_list_fragment"

res/layout/search_toolbar.xml

@@ -13,7 +13,7 @@
             android:background="?attr/search_toolbar_background"/>
 
     <View android:layout_width="match_parent"
-          android:layout_height="7dp"
+          android:layout_height="4dp"
           android:background="@drawable/search_toolbar_shadow"/>
 
 </merge>

res/layout/share_activity.xml

@@ -14,6 +14,7 @@
             android:layout_height="?attr/actionBarSize"
             android:minHeight="?attr/actionBarSize"
             android:background="?attr/colorPrimary"
+            android:elevation="4dp"
             android:theme="?attr/actionBarStyle">
 
         <RelativeLayout
@@ -55,6 +56,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_alignParentTop="true"
+            android:elevation="4dp"
             android:visibility="invisible"
             tools:visibility="invisible"/>
 

res/values/styles.xml

@@ -43,6 +43,7 @@
            parent="@style/Widget.AppCompat.ActionBar">
         <item name="background">@color/gray95</item>
         <item name="android:popupTheme">@style/ThemeOverlay.AppCompat.Dark</item>
+        <item name="elevation">4dp</item>
         <item name="popupTheme">@style/ThemeOverlay.AppCompat.Dark</item>
         <item name="titleTextStyle">@style/TextSecure.TitleTextStyle</item>
         <item name="subtitleTextStyle">@style/TextSecure.SubtitleTextStyle</item>
@@ -51,7 +52,7 @@
     <style name="TextSecure.LightActionBar"
            parent="@style/Widget.AppCompat.ActionBar">
         <item name="background">@color/textsecure_primary</item>
-        <item name="elevation">2dp</item>
+        <item name="elevation">4dp</item>
         <item name="popupTheme">@style/ThemeOverlay.AppCompat.Light</item>
         <item name="titleTextStyle">@style/TextSecure.TitleTextStyle</item>
         <item name="subtitleTextStyle">@style/TextSecure.SubtitleTextStyle</item>
@@ -68,12 +69,14 @@
         parent="@style/Widget.AppCompat.ActionBar.TabBar">
         <item name="background">@color/gray95</item>
         <item name="android:background">@color/gray95</item>
+        <item name="elevation">4dp</item>
     </style>
 
     <style name="TextSecure.LightActionBar.TabBar"
         parent="@style/Widget.AppCompat.ActionBar.TabBar">
         <item name="android:background">@color/textsecure_primary</item>
         <item name="background">@color/textsecure_primary</item>
+        <item name="elevation">4dp</item>
     </style>
 
     <style name="TextSecure.TitleTextStyle" parent="TextAppearance.AppCompat.Widget.ActionBar.Title">