Fixed a minor bug in login activity (could not add dialog to activity) as well as spinner hint adapter (array out of bound)

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

@@ -21,7 +21,7 @@
             tools:context=".MapsActivity" >
         </fragment>
 
-        <android.support.design.widget.FloatingActionButton
+        <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/fab_reportwf_map"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"