def-tool: Scan ELF files in zip files

This commit adds `--unzip-files` to the definition tool so that
definition tool will scan the ELF files in the APK files.

Bug: 120519679
Test: ./vndk_definition_tool.py deps-insight \
    --system ${ANDROID_PRODUCT_OUT}/system \
    --vendor ${ANDROID_PRODUCT_OUT}/vendor \
    --tag-file datasets/eligible-list-29.csv \
    -o output_html
Change-Id: Id2e3295d70f3d9ff060dd6b64121f2b0464ceece