add a placeholder account icon to drawer

org.fox.ttrss/src/main/java/org/fox/ttrss/FeedCategoriesFragment.java

@@ -26,7 +26,6 @@ import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ArrayAdapter;
 import android.widget.ImageButton;
-import android.widget.ImageView;
 import android.widget.ListView;
 import android.widget.TextView;
 
@@ -241,6 +240,7 @@ public class FeedCategoriesFragment extends Fragment implements OnItemClickListe
                 } catch (MalformedURLException e) {
                     server.setText("");
                 }
+
             } catch (InflateException e) {
                 // welp couldn't inflate header i guess
                 e.printStackTrace();

org.fox.ttrss/src/main/res/drawable/circle_bg.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+
+    <solid
+        android:color="@android:color/white"/>
+
+    <size
+        android:width="48dp"
+        android:height="48dp"/>
+</shape>

org.fox.ttrss/src/main/res/layout/drawer_header.xml

@@ -16,13 +16,30 @@
         android:tint="?colorPrimaryDark"
         android:tintMode="multiply" />
 
+    <FrameLayout
+        android:layout_width="48dp"
+        android:layout_height="48dp"
+        android:background="@drawable/circle_bg"
+        android:layout_centerVertical="true"
+        android:layout_alignParentRight="true"
+        android:layout_alignParentEnd="true"
+        android:layout_marginRight="16dp" >
+
+        <ImageView
+            android:layout_width="36dp"
+            android:layout_height="36dp"
+            android:src="@drawable/ic_account"
+            android:layout_gravity="center" />
+    </FrameLayout>
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="56dp"
         android:orientation="vertical"
         android:layout_alignParentBottom="true"
         android:layout_alignParentLeft="true"
-        android:layout_alignParentStart="true">
+        android:layout_alignParentStart="true"
+        android:id="@+id/linearLayout">
 
         <TextView
             android:id="@+id/drawer_header_login"