dev-util/android-studio: Unbundled some stuff, fixed bug

dev-util/android-studio: Unbundled some stuff, fixed bug

1. Unbundled jdk posing as a jre, replaced with symlink to system vm/jdk
2. Unbundled a few jars for system installed, more can be done, as
   usually several deps in gentoo are outdated so need to be updated
3. Unbundling jre/jdk fixes bug #594584, otherwise that directory needs
   to be added to the list of fperms. Using system should be a better
   approach, and will be updated with security updates, etc.
4. chmod gradle/gradle-*/bin/gradle because fperms does not work with
   globs.

Package-Manager: portage-2.3.1
Signed-off-by: Jason Zaman <perfinion@gentoo.org>