[RELEASE ONLY] Android custom op registration

[kirklandsign]

In main branch, the custom op registration is using new API. However, this is not present in release/0.2. We need it for LLAMA to work.

[pytorch-bot[bot]]

:link: Helpful Links

:test_tube: See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/3284

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:x: 3 New Failures

As of commit 670c1f87427b3b816d1297c77328ce910c6115ff with merge base d3326a2073dee7baf78044fb3afd0772edbc616a ():

NEW FAILURES - The following jobs have failed:

• Apple / test-demo-ios / macos-job (gh) RuntimeError: Command bash /Users/runner/work/_temp/exec_script failed with exit code 1
• Apple / upload-frameworks-ios (gh) Credentials could not be loaded, please check your action inputs: Could not load credentials from any providers
• trunk / test-models-macos (cmake, mv2, portable, macos-m1-stable, 90) / macos-job (gh) RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

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[guangy10]

There are apple jobs failure which doesn't look relevant