To allow reusing the logic which detects the appropriate
Android SDK version to use for building the Java code,
this is now separated into its own .prf file. This is
required by Qt Purchasing to avoid duplicating the logic
there.
Change-Id: Ief5f5e70dab79751ef9e5a9c4a019bfda686cd09
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>