jpegrecoverymap: fix linkage for tests.

Ensure that the actual lib code in your repo is tested when running the
tests by updating linkage from shared to static. This way one won't
accidentally be testing whatever is on their system imagr rather than
their working tree.

Bug: 264715926
Test: tests pass
Change-Id: I7cc4db6a59c42f72e90fcfb39c668c4776592b5d