Revert "Pin objenesis to Java language level 8."

The original change was made to support loading this library from an
OpenJDK 8 runtime as part of layoutlib. This is no longer required as
layoutlib now runs with OpenJDK 11.

This reverts commit 170bfdd5ca3fdbd2a3a99ce825dca3382e307bbf.

Test: EXPERIMENTAL_JAVA_LANGUAGE_LEVEL_9=true make layoutlib layoutlib-tests sdk libandroid_runtime
Test: frameworks/layoutlib/bridge/tests/run_tests.sh out/layoutlib-failures
Bug: 142116384
Change-Id: Idff1cc04e8a0a2ee86123ba7ac87d3fccf364c8e
1 file changed