Pass ANGLE rules file descriptor through JNI

We are now loading the json rules from ANGLE's APK, passing
that through to the loader via a file descriptor.

Bug: 80239516
Test: Manual build, ensure we can inspect rules from modified APK
Test: cts-tradefed run singleCommand cts -m CtsAngleIntegrationHostTestCases
Change-Id: I9387d8b4a40cd035c40db9466a13666b262c5724
(cherry picked from commit eeffc9df36d117ec35ea5aaf9d62b8fea733b298)