Allow file sharing from AppRTCMobile app.

This is required for the bots to get files off devices after
running tests.

Bug: webrtc:8316
Change-Id: If48d7b95c1a3aa54e7ee07e7f2a75e6bc88e184a
Reviewed-on: https://webrtc-review.googlesource.com/5400
Reviewed-by: Daniela Jovanoska Petrenko <denicija@webrtc.org>
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20067}
diff --git a/examples/objc/AppRTCMobile/ios/Info.plist b/examples/objc/AppRTCMobile/ios/Info.plist
index 2b382c4..90d6bb4 100644
--- a/examples/objc/AppRTCMobile/ios/Info.plist
+++ b/examples/objc/AppRTCMobile/ios/Info.plist
@@ -67,6 +67,8 @@
   <string>Camera access needed for video calling</string>
   <key>NSMicrophoneUsageDescription</key>
   <string>Microphone access needed for video calling</string>
+  <key>UIFileSharingEnabled</key>
+  <true/>
   <key>UILaunchImages</key>
   <array>
     <dict>