catch security exception when user prevents access to address book

src/main/java/eu/siacs/conversations/utils/PhoneHelper.java

@@ -36,16 +36,14 @@ public class PhoneHelper {
 				+ "=\"" + ContactsContract.CommonDataKinds.Im.PROTOCOL_JABBER
 				+ "\")";
 
-		CursorLoader mCursorLoader = new CursorLoader(context,
+		CursorLoader mCursorLoader = new NotThrowCursorLoader(context,
 				ContactsContract.Data.CONTENT_URI, PROJECTION, SELECTION, null,
 				null);
 		mCursorLoader.registerListener(0, new OnLoadCompleteListener<Cursor>() {
 
 			@Override
 			public void onLoadComplete(Loader<Cursor> arg0, Cursor cursor) {
-				if (cursor == null) {
-					return;
-				}
+				if (cursor != null) {
 					while (cursor.moveToNext()) {
 						Bundle contact = new Bundle();
 						contact.putInt("phoneid", cursor.getInt(cursor
@@ -65,10 +63,12 @@ public class PhoneHelper {
 										.getColumnIndex(ContactsContract.CommonDataKinds.Im.DATA)));
 						phoneContacts.add(contact);
 					}
+					cursor.close();
+				}
+
 				if (listener != null) {
 					listener.onPhoneContactsLoaded(phoneContacts);
 				}
-				cursor.close();
 			}
 		});
 		try {
@@ -80,6 +80,24 @@ public class PhoneHelper {
 		}
 	}
 
+	private static class NotThrowCursorLoader extends CursorLoader {
+
+		public NotThrowCursorLoader(Context c, Uri u, String[] p, String s, String[] sa, String so) {
+			super(c, u, p, s, sa, so);
+		}
+
+		@Override
+		public Cursor loadInBackground() {
+
+			try {
+				return (super.loadInBackground());
+			} catch (SecurityException e) {
+				return(null);
+			}
+		}
+
+	}
+
 	public static Uri getSefliUri(Context context) {
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
 				&& context.checkSelfPermission(Manifest.permission.READ_CONTACTS) != PackageManager.PERMISSION_GRANTED) {