Bring back the label for multiple upload intent (#2221)

In the upload revamp, commit f607c1c (Multiple uploads with over haul (#1968), 19 Nov 2018),
kept back the label for the single upload intent but removed the label for the multiple upload
intent.

Correct it and bring back the label for the multiple upload intent thus giving a more useful
label for the intent, again.

Author: sivaraam

app/src/main/AndroidManifest.xml

@@ -55,7 +55,7 @@
                 <data android:mimeType="image/*" />
                 <data android:mimeType="audio/ogg" />
             </intent-filter>
-            <intent-filter>
+            <intent-filter android:label="@string/intent_share_upload_label">
                 <action android:name="android.intent.action.SEND_MULTIPLE" />
 
                 <category android:name="android.intent.category.DEFAULT" />
@@ -218,4 +218,4 @@
 
     </application>
 
-</manifest>
+</manifest>