On Mac OS X, it apparently suffices to execute "new java.awt.Dimension()" to run
into "Apple AWT Java VM was loaded on first thread -- can't start AWT" (see
<http://developer.apple.com/library/mac/#technotes/tn2005/tn2147.html> "JNI
Development on Mac OS X - Thread-Safe JNI Programming - Calling AWT/Swing From
AppKit").

The solution here is simple, in that uses of java.awt.Dimension can be replaced
with com.sun.star.awt.Size without loss of functionality.  However, there are
still occurrences of java.awt.Image and java.awt.Toolkit lurking
(reportbuilder/java/com/sun/star/report/SOImageService.java,
reportbuilder/java/com/sun/star/report/pentaho/output/ImageProducer.java,
reportbuilder/java/com/sun/star/report/pentaho/output/OfficeDocumentReportTarget.java)
for which it might be sheer luck that they do not seem to cause trouble yet.

Change-Id: I33e9f74c50ebddc11bd1d9a48c55dc8f8700345d