Add vts_vndk_files_test

This commit copies VtsVndkFilesTest.py to vts_vndk_files_test.py,
removes the dependency on VTS framework, and adds a python_test_host
module for the new file.

Bug: 147454897
Test: ANDROID_SERIAL=1234 \
      LD_LIBRARY_PATH=$ANDROID_HOST_OUT/lib64 \
      $ANDROID_HOST_OUT/nativetest64/vts_vndk_files_test/vts_vndk_files_test \
      --verbose

Change-Id: I4e8ee887a80fdaafed61456fee02405a145df5d3
Merged-In: I4e8ee887a80fdaafed61456fee02405a145df5d3
(cherry picked from commit d23ea9199060361e365319ec2c45d94c6d3a7488)
4 files changed