Zoom (#1300)

*  Basic Zoom feature added along with button to control it

*  Pinch Zoom added

*  Merge Conflicts Resolved

*  Icons Changed

*  Compressed the high resolution images

* Fixed null pointer exception

* Fixed null pointer exception

*  Fixed exception

*  Fixed error

*  Fixed Resource availability issue

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

@@ -19,7 +19,8 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:layout_below="@id/toolbar"
-            android:background="?attr/mainBackground">
+            android:background="?attr/mainBackground"
+            android:id="@+id/container">
 
             <com.facebook.drawee.view.SimpleDraweeView
                 android:id="@+id/backgroundImage"
@@ -32,7 +33,35 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent" />
 
+            <com.github.chrisbanes.photoview.PhotoView
+                android:id="@+id/expanded_image"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:visibility="invisible" />
+
         </FrameLayout>
+
+
+
+        <android.support.design.widget.FloatingActionButton
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentRight="true"
+            android:layout_alignParentBottom="true"
+            android:layout_marginRight="@dimen/standard_gap"
+            android:layout_marginBottom="@dimen/standard_gap"
+            android:src="@drawable/ic_zoom_in_white_24dp"
+            android:id="@+id/media_upload_zoom_in"/>
+        <android.support.design.widget.FloatingActionButton
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentRight="true"
+            android:layout_alignParentBottom="true"
+            android:visibility="gone"
+            android:layout_marginRight="@dimen/standard_gap"
+            android:layout_marginBottom="@dimen/standard_gap"
+            android:src="@drawable/ic_zoom_out_white_24dp"
+            android:id="@+id/media_upload_zoom_out"/>
     </RelativeLayout>
 
     <android.support.design.widget.NavigationView

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

@@ -88,3 +88,4 @@
 
     </LinearLayout>
 </ScrollView>
+

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

@@ -34,6 +34,7 @@
             android:textColor="#FFFFFFFF"
             style="?android:textAppearanceSmall"
             />
+
     </RelativeLayout>
 
 </FrameLayout>