Use different namespace for each Android library
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For the most up to date status, view the checks section at the bottom of the pull request. Hi @terryheo Can you please review this PR ? Thank you!
Android requires all libraries to have a unique namespace defined in their manifest. Changes made:

- Added manifests for the api and gpu libraries
- Renamed AndroidManifestGpu.xml to AndroidManifestGpuApi.xml for consistent naming

Note: I couldn't figure out which manifest is used for tensorflow-lite-select-tf-ops. Since it was still compiling after half an hour I skipped that one.

Fixes #61853