Task #237 [android] HiFive - Add Task UI 작업 & 디자인 적용

http://www.junstarok.com/redmine/issues/237

받는사람 선택 디자인 적용

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

@@ -102,6 +102,7 @@
                 android:layout_height="match_parent"
                 android:layout_marginTop="@dimen/add_task_toolbar_height"
                 android:layout_weight="1"
+                android:background="@color/white"
                 android:orientation="vertical">
 
                 <View