Implement Google Drive Quick Links app fixes

1) Use constants in the portlet class instead of "property_name"
   Javadoc and styling as necessary.
2) DriveLinksLocalServiceImpl.java
    count = driveLinksPersistence.findByUserId(userId).size();
    use .countBy.. method.
3) UpdateGoogleKeysAction - is this used?
4) We need a message if the keys are not configured.
5) Make sure the wiki page screenshots does not have the actual key or client id. this could still be obtained from the request urls.
6) the wiki page documentation step about turning on "Drive API and Drive SDK" needs to change to turn on "Google Picker API"
   as that is the only one needed for this app to function.
   Also the wiki page mentions about server key. Since this is based on browser communication, browser key is sufficient.
7) Change messages
    "No Links to display" - change to "There are no quick links"
8) Change portlet display name and title to include ".. My .."
9) Include document Id to schema and make it part of the key. Name may not be unique as user may have more than
one file with same name in different folders.
10) Select File is only available for logged in user.
    We can remove access to guest from portlet.xml and liferay-portlet.xml
11) Make the name of the file a direct link to google drive to open in a new window/tab