Bug 1538270 - Show toast for default file picker when permissions denied.;r=VladBaicu

Differential Revision: https://phabricator.services.mozilla.com/D32073

--HG--
extra : moz-landing-system : lando

mobile/android/base/java/org/mozilla/gecko/FilePicker.java

@@ -22,6 +22,7 @@ import android.os.Parcelable;
 import android.support.annotation.NonNull;
 import android.text.TextUtils;
 import android.util.Log;
+import android.widget.Toast;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -90,6 +91,7 @@ public class FilePicker implements BundleEventListener {
                         // TODO: Figure out which permissions have been denied and use that
                         // knowledge for availPermissions. For now we assume we don't have any
                         // permissions at all (bug 1411014).
+                        Toast.makeText(context, context.getString(R.string.filepicker_permission_denied), Toast.LENGTH_LONG).show();
                         showFilePickerAsync(title, "*/*", new String[0], isModeOpenMultiple, new ResultHandler() {
                             @Override
                             public void gotFile(final String filename) {

mobile/android/base/locales/en-US/android_strings.dtd

@@ -671,6 +671,7 @@ shown from Android O while a tab is being queued.-->
 <!ENTITY filepicker_audio_title "Choose or record a sound">
 <!ENTITY filepicker_image_title "Choose or take a picture">
 <!ENTITY filepicker_video_title "Choose or record a video">
+<!ENTITY filepicker_permission_denied "Required permissions not granted, reverting to the system file picker. ">
 
 <!-- Site identity popup -->
 <!ENTITY identity_connected_to "You are connected to">

mobile/android/base/strings.xml.in

@@ -481,6 +481,8 @@
   <string name="filepicker_audio_title">&filepicker_audio_title;</string>
   <string name="filepicker_image_title">&filepicker_image_title;</string>
   <string name="filepicker_video_title">&filepicker_video_title;</string>
+  <!-- Toast for default file picker when authority is denied. -->
+  <string name="filepicker_permission_denied">&filepicker_permission_denied;</string>
 
   <!-- Default bookmarks. We used to use bookmark titles shared with XUL from mobile's
        profile/bookmarks.inc (see bug 964946). Don't expose the URLs to L10N. -->